140331420 has 192 divisors, whose sum is σ = 460615680. Its totient is φ = 35424000.

The previous prime is 140331419. The next prime is 140331421. The reversal of 140331420 is 24133041.

It is an interprime number because it is at equal distance from previous prime (140331419) and next prime (140331421).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 140331393 and 140331402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (140331421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1389370 + ... + 1389470.

It is an arithmetic number, because the mean of its divisors is an integer number (2399040).

Almost surely, 2^140331420 is an apocalyptic number.

140331420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 140331420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (230307840).

140331420 is an abundant number, since it is smaller than the sum of its proper divisors (320284260).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

140331420 is a wasteful number, since it uses less digits than its factorization.

140331420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 233 (or 225 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

The square root of 140331420 is about 11846.1563386611. The cubic root of 140331420 is about 519.6588245249.

Adding to 140331420 its reverse (24133041), we get a palindrome (164464461).

It can be divided in two parts, 1403 and 31420, that added together give a palindrome (32823).

The spelling of 140331420 in words is "one hundred forty million, three hundred thirty-one thousand, four hundred twenty".