140431320 has 160 divisors (see below), whose sum is σ = 478288800. Its totient is φ = 36951552.

The previous prime is 140431303. The next prime is 140431321. The reversal of 140431320 is 23134041.

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 = 140431293 and 140431302.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (140431321) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 288117 + ... + 288603.

It is an arithmetic number, because the mean of its divisors is an integer number (2989305).

Almost surely, 2^140431320 is an apocalyptic number.

140431320 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 140431320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (239144400).

140431320 is an abundant number, since it is smaller than the sum of its proper divisors (337857480).

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

140431320 is a wasteful number, since it uses less digits than its factorization.

140431320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 599 (or 586 counting only the distinct ones).

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

The square root of 140431320 is about 11850.3721460552. The cubic root of 140431320 is about 519.7821079220.

Adding to 140431320 its reverse (23134041), we get a palindrome (163565361).

The spelling of 140431320 in words is "one hundred forty million, four hundred thirty-one thousand, three hundred twenty".