1972790856 has 32 divisors (see below), whose sum is σ = 5479975200. Its totient is φ = 657596880.

The previous prime is 1972790849. The next prime is 1972790893. The reversal of 1972790856 is 6580972791.

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, 4566430 + ... + 4566861.

It is an arithmetic number, because the mean of its divisors is an integer number (171249225).

Almost surely, 2^1972790856 is an apocalyptic number.

It is an amenable number.

1972790856 is an abundant number, since it is smaller than the sum of its proper divisors (3507184344).

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

1972790856 is a wasteful number, since it uses less digits than its factorization.

1972790856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9133306 (or 9133296 counting only the distinct ones).

The product of its (nonzero) digits is 1905120, while the sum is 54.

The square root of 1972790856 is about 44416.1103204682. The cubic root of 1972790856 is about 1254.1813798671.

The spelling of 1972790856 in words is "one billion, nine hundred seventy-two million, seven hundred ninety thousand, eight hundred fifty-six".