3215646140 has 24 divisors (see below), whose sum is σ = 7717551072. Its totient is φ = 1102507200.

The previous prime is 3215646139. The next prime is 3215646197. The reversal of 3215646140 is 416465123.

It is a junction number, because it is equal to n+sod(n) for n = 3215646097 and 3215646106.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11484311 + ... + 11484590.

It is an arithmetic number, because the mean of its divisors is an integer number (321564628).

Almost surely, 2^3215646140 is an apocalyptic number.

It is an amenable number.

3215646140 is an abundant number, since it is smaller than the sum of its proper divisors (4501904932).

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

3215646140 is a wasteful number, since it uses less digits than its factorization.

3215646140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22968917 (or 22968915 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 32.

The square root of 3215646140 is about 56706.6675092092. The cubic root of 3215646140 is about 1476.0103987683.

The spelling of 3215646140 in words is "three billion, two hundred fifteen million, six hundred forty-six thousand, one hundred forty".