1972722888 has 24 divisors (see below), whose sum is σ = 5342791350. Its totient is φ = 657574272.

The previous prime is 1972722887. The next prime is 1972722901. The reversal of 1972722888 is 8882272791.

1972722888 is a `hidden beast` number, since 1 + 97 + 272 + 288 + 8 = 666.

It can be written as a sum of positive squares in only one way, i.e., 1937936484 + 34786404 = 44022^2 + 5898^2 .

It is a tau number, because it is divible by the number of its divisors (24).

It is a hoax number, since the sum of its digits (54) 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 (1972722881) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 13699393 + ... + 13699536.

Almost surely, 2^1972722888 is an apocalyptic number.

1972722888 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

1972722888 is an abundant number, since it is smaller than the sum of its proper divisors (3370068462).

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

1972722888 is a wasteful number, since it uses less digits than its factorization.

1972722888 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27398941 (or 27398934 counting only the distinct ones).

The product of its digits is 1806336, while the sum is 54.

The square root of 1972722888 is about 44415.3451860953. The cubic root of 1972722888 is about 1254.1669763840.

The spelling of 1972722888 in words is "one billion, nine hundred seventy-two million, seven hundred twenty-two thousand, eight hundred eighty-eight".