640087602 has 32 divisors (see below), whose sum is σ = 1596063744. Its totient is φ = 166256400.

The previous prime is 640087571. The next prime is 640087619. The reversal of 640087602 is 206780046.

640087602 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×640087602² = 819424276468220808, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 692274 + ... + 693197.

It is an arithmetic number, because the mean of its divisors is an integer number (49876992).

Almost surely, 2^640087602 is an apocalyptic number.

640087602 is an abundant number, since it is smaller than the sum of its proper divisors (955976142).

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

640087602 is a wasteful number, since it uses less digits than its factorization.

640087602 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1385494.

The product of its (nonzero) digits is 16128, while the sum is 33.

The square root of 640087602 is about 25299.9526086513. The cubic root of 640087602 is about 861.8131935497.

The spelling of 640087602 in words is "six hundred forty million, eighty-seven thousand, six hundred two".