402564140 has 96 divisors (see below), whose sum is σ = 967292928. Its totient is φ = 139392000.

The previous prime is 402564089. The next prime is 402564161. The reversal of 402564140 is 41465204.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 456500 + ... + 457380.

It is an arithmetic number, because the mean of its divisors is an integer number (10075968).

Almost surely, 2^402564140 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 402564140, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (483646464).

402564140 is an abundant number, since it is smaller than the sum of its proper divisors (564728788).

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

402564140 is a wasteful number, since it uses less digits than its factorization.

402564140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 999 (or 997 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 26.

The square root of 402564140 is about 20064.0010964912. The cubic root of 402564140 is about 738.3773429371.

The spelling of 402564140 in words is "four hundred two million, five hundred sixty-four thousand, one hundred forty".