1977923472 has 40 divisors (see below), whose sum is σ = 5839584576. Its totient is φ = 565120896.

The previous prime is 1977923459. The next prime is 1977923489. The reversal of 1977923472 is 2743297791.

It is a super-2 number, since 2×1977923472² = 7824362522177069568, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2943003 + ... + 2943674.

Almost surely, 2^1977923472 is an apocalyptic number.

1977923472 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1977923472 is an abundant number, since it is smaller than the sum of its proper divisors (3861661104).

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

1977923472 is a wasteful number, since it uses less digits than its factorization.

1977923472 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5886695 (or 5886689 counting only the distinct ones).

The product of its digits is 1333584, while the sum is 51.

The square root of 1977923472 is about 44473.8515534690. The cubic root of 1977923472 is about 1255.2681071405.

The spelling of 1977923472 in words is "one billion, nine hundred seventy-seven million, nine hundred twenty-three thousand, four hundred seventy-two".