402637620 has 96 divisors (see below), whose sum is σ = 1405587456. Its totient is φ = 83664000.

The previous prime is 402637603. The next prime is 402637643. The reversal of 402637620 is 26736204.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

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 31 ways as a sum of consecutive naturals, for example, 38956 + ... + 48195.

It is an arithmetic number, because the mean of its divisors is an integer number (14641536).

Almost surely, 2^402637620 is an apocalyptic number.

It is an amenable number.

402637620 is an abundant number, since it is smaller than the sum of its proper divisors (1002949836).

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

402637620 is a wasteful number, since it uses less digits than its factorization.

402637620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 87181 (or 87179 counting only the distinct ones).

The product of its (nonzero) digits is 12096, while the sum is 30.

The square root of 402637620 is about 20065.8321531902. The cubic root of 402637620 is about 738.4222655229.

The spelling of 402637620 in words is "four hundred two million, six hundred thirty-seven thousand, six hundred twenty".