402052636 has 12 divisors (see below), whose sum is σ = 727854120. Its totient is φ = 194094320.

The previous prime is 402052633. The next prime is 402052649. The reversal of 402052636 is 636250204.

It is a happy number.

It is a super-2 number, since 2×402052636² = 323292644229096992, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (402052633) 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, 1732870 + ... + 1733101.

It is an arithmetic number, because the mean of its divisors is an integer number (60654510).

Almost surely, 2^402052636 is an apocalyptic number.

It is an amenable number.

402052636 is a deficient number, since it is larger than the sum of its proper divisors (325801484).

402052636 is a wasteful number, since it uses less digits than its factorization.

402052636 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3466004 (or 3466002 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 28.

The square root of 402052636 is about 20051.2502353345. The cubic root of 402052636 is about 738.0644793020.

The spelling of 402052636 in words is "four hundred two million, fifty-two thousand, six hundred thirty-six".