402564252 has 12 divisors (see below), whose sum is σ = 939316616. Its totient is φ = 134188080.

The previous prime is 402564251. The next prime is 402564263. The reversal of 402564252 is 252465204.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (12).

It is a hoax number, since the sum of its digits (30) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (402564251) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16773499 + ... + 16773522.

Almost surely, 2^402564252 is an apocalyptic number.

It is an amenable number.

402564252 is an abundant number, since it is smaller than the sum of its proper divisors (536752364).

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

402564252 is a wasteful number, since it uses less digits than its factorization.

402564252 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33547028 (or 33547026 counting only the distinct ones).

The product of its (nonzero) digits is 19200, while the sum is 30.

The square root of 402564252 is about 20064.0038875594. The cubic root of 402564252 is about 738.3774114134.

The spelling of 402564252 in words is "four hundred two million, five hundred sixty-four thousand, two hundred fifty-two".