1977929004 has 24 divisors (see below), whose sum is σ = 4673589760. Its totient is φ = 650963664.

The previous prime is 1977929003. The next prime is 1977929027. The reversal of 1977929004 is 4009297791.

It is a happy number.

It is a Smith number, since the sum of its digits (48) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (1977929003) by changing a digit.

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, 1042264 + ... + 1044159.

Almost surely, 2^1977929004 is an apocalyptic number.

It is an amenable number.

1977929004 is an abundant number, since it is smaller than the sum of its proper divisors (2695660756).

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

1977929004 is a wasteful number, since it uses less digits than its factorization.

1977929004 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2086509 (or 2086507 counting only the distinct ones).

The product of its (nonzero) digits is 285768, while the sum is 48.

The square root of 1977929004 is about 44473.9137472744. The cubic root of 1977929004 is about 1255.2692774145.

The spelling of 1977929004 in words is "one billion, nine hundred seventy-seven million, nine hundred twenty-nine thousand, four".