140402420 has 24 divisors (see below), whose sum is σ = 302815464. Its totient is φ = 54642816.

The previous prime is 140402417. The next prime is 140402443. The reversal of 140402420 is 24204041.

140402420 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 35093776 + 105308644 = 5924^2 + 10262^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 94127 + ... + 95606.

It is an arithmetic number, because the mean of its divisors is an integer number (12617311).

Almost surely, 2^140402420 is an apocalyptic number.

140402420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

140402420 is an abundant number, since it is smaller than the sum of its proper divisors (162413044).

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

140402420 is a wasteful number, since it uses less digits than its factorization.

140402420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 189779 (or 189777 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 17.

The square root of 140402420 is about 11849.1527123250. The cubic root of 140402420 is about 519.7464493678.

Adding to 140402420 its reverse (24204041), we get a palindrome (164606461).

The spelling of 140402420 in words is "one hundred forty million, four hundred two thousand, four hundred twenty".