3600400640 has 36 divisors (see below), whose sum is σ = 8624087724. Its totient is φ = 1440159744.

The previous prime is 3600400633. The next prime is 3600400679. The reversal of 3600400640 is 460040063.

It can be written as a sum of positive squares in 2 ways, for example, as 2842169344 + 758231296 = 53312^2 + 27536^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1405127 + ... + 1407686.

Almost surely, 2^3600400640 is an apocalyptic number.

It is an amenable number.

3600400640 is an abundant number, since it is smaller than the sum of its proper divisors (5023687084).

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

3600400640 is an equidigital number, since it uses as much as digits as its factorization.

3600400640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2812834 (or 2812820 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 23.

The square root of 3600400640 is about 60003.3385737827. The cubic root of 3600400640 is about 1532.6757171617.

The spelling of 3600400640 in words is "three billion, six hundred million, four hundred thousand, six hundred forty".