1977008992 has 48 divisors (see below), whose sum is σ = 4494178080. Its totient is φ = 838545408.

The previous prime is 1977008947. The next prime is 1977009007. The reversal of 1977008992 is 2998007791.

It is a congruent number.

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, 23767 + ... + 67222.

It is an arithmetic number, because the mean of its divisors is an integer number (93628710).

Almost surely, 2^1977008992 is an apocalyptic number.

It is an amenable number.

1977008992 is an abundant number, since it is smaller than the sum of its proper divisors (2517169088).

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

1977008992 is an equidigital number, since it uses as much as digits as its factorization.

1977008992 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 91103 (or 91095 counting only the distinct ones).

The product of its (nonzero) digits is 571536, while the sum is 52.

The square root of 1977008992 is about 44463.5692674351. The cubic root of 1977008992 is about 1255.0746223148.

The spelling of 1977008992 in words is "one billion, nine hundred seventy-seven million, eight thousand, nine hundred ninety-two".