3215695240 has 32 divisors (see below), whose sum is σ = 7299353880. Its totient is φ = 1274893312.

The previous prime is 3215695213. The next prime is 3215695243. The reversal of 3215695240 is 425965123.

It can be written as a sum of positive squares in 4 ways, for example, as 2000057284 + 1215637956 = 44722^2 + 34866^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 3215695240.

It is not an unprimeable number, because it can be changed into a prime (3215695243) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 351199 + ... + 360238.

Almost surely, 2^3215695240 is an apocalyptic number.

It is an amenable number.

3215695240 is an abundant number, since it is smaller than the sum of its proper divisors (4083658640).

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

3215695240 is a wasteful number, since it uses less digits than its factorization.

3215695240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 711561 (or 711557 counting only the distinct ones).

The product of its (nonzero) digits is 64800, while the sum is 37.

The square root of 3215695240 is about 56707.1004372468. The cubic root of 3215695240 is about 1476.0179111768.

The spelling of 3215695240 in words is "three billion, two hundred fifteen million, six hundred ninety-five thousand, two hundred forty".