402431340 has 48 divisors (see below), whose sum is σ = 1130865120. Its totient is φ = 106928640.

The previous prime is 402431321. The next prime is 402431383. The reversal of 402431340 is 43134204.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4926 + ... + 28794.

It is an arithmetic number, because the mean of its divisors is an integer number (23559690).

Almost surely, 2^402431340 is an apocalyptic number.

It is an amenable number.

402431340 is an abundant number, since it is smaller than the sum of its proper divisors (728433780).

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

402431340 is a wasteful number, since it uses less digits than its factorization.

402431340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24162 (or 24160 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 21.

The square root of 402431340 is about 20060.6914138073. The cubic root of 402431340 is about 738.2961407254.

Adding to 402431340 its reverse (43134204), we get a palindrome (445565544).

The spelling of 402431340 in words is "four hundred two million, four hundred thirty-one thousand, three hundred forty".