640036416 has 112 divisors (see below), whose sum is σ = 1760329728. Its totient is φ = 205017600.

The previous prime is 640036403. The next prime is 640036483. The reversal of 640036416 is 614630046.

It is a super-2 number, since 2×640036416² = 819293227612250112, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1136551 + ... + 1137113.

Almost surely, 2^640036416 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 640036416, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (880164864).

640036416 is an abundant number, since it is smaller than the sum of its proper divisors (1120293312).

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

640036416 is a wasteful number, since it uses less digits than its factorization.

640036416 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 800 (or 790 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 30.

The square root of 640036416 is about 25298.9410055046. The cubic root of 640036416 is about 861.7902206806.

The spelling of 640036416 in words is "six hundred forty million, thirty-six thousand, four hundred sixteen".