2170640972 has 24 divisors (see below), whose sum is σ = 3862172160. Its totient is φ = 1067274000.

The previous prime is 2170640929. The next prime is 2170640999. The reversal of 2170640972 is 2790460712.

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, 65633 + ... + 92999.

It is an arithmetic number, because the mean of its divisors is an integer number (160923840).

Almost surely, 2^2170640972 is an apocalyptic number.

It is an amenable number.

2170640972 is a deficient number, since it is larger than the sum of its proper divisors (1691531188).

2170640972 is a wasteful number, since it uses less digits than its factorization.

2170640972 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27701 (or 27699 counting only the distinct ones).

The product of its (nonzero) digits is 42336, while the sum is 38.

The square root of 2170640972 is about 46590.1381410272. The cubic root of 2170640972 is about 1294.7800488087.

The spelling of 2170640972 in words is "two billion, one hundred seventy million, six hundred forty thousand, nine hundred seventy-two".