1972740172 has 12 divisors (see below), whose sum is σ = 3717856576. Its totient is φ = 910495440.

The previous prime is 1972740157. The next prime is 1972740173. The reversal of 1972740172 is 2710472791.

It is a hoax number, since the sum of its digits (40) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (1972740173) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18968604 + ... + 18968707.

Almost surely, 2^1972740172 is an apocalyptic number.

It is an amenable number.

1972740172 is a deficient number, since it is larger than the sum of its proper divisors (1745116404).

1972740172 is a wasteful number, since it uses less digits than its factorization.

1972740172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37937328 (or 37937326 counting only the distinct ones).

The product of its (nonzero) digits is 49392, while the sum is 40.

The square root of 1972740172 is about 44415.5397580622. The cubic root of 1972740172 is about 1254.1706391655.

The spelling of 1972740172 in words is "one billion, nine hundred seventy-two million, seven hundred forty thousand, one hundred seventy-two".