1972972836 has 24 divisors (see below), whose sum is σ = 5115115040. Its totient is φ = 657657576.

The previous prime is 1972972829. The next prime is 1972972843. The reversal of 1972972836 is 6382792791.

It is an interprime number because it is at equal distance from previous prime (1972972829) and next prime (1972972843).

It is a Harshad number since it is a multiple of its sum of digits (54).

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, 9134026 + ... + 9134241.

Almost surely, 2^1972972836 is an apocalyptic number.

It is an amenable number.

1972972836 is an abundant number, since it is smaller than the sum of its proper divisors (3142142204).

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

1972972836 is a wasteful number, since it uses less digits than its factorization.

1972972836 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18268280 (or 18268272 counting only the distinct ones).

The product of its digits is 2286144, while the sum is 54.

The square root of 1972972836 is about 44418.1588542344. The cubic root of 1972972836 is about 1254.2199426489.

The spelling of 1972972836 in words is "one billion, nine hundred seventy-two million, nine hundred seventy-two thousand, eight hundred thirty-six".