1979705928 has 32 divisors (see below), whose sum is σ = 4950590400. Its totient is φ = 659725248.

The previous prime is 1979705927. The next prime is 1979705963. The reversal of 1979705928 is 8295079791.

It is a super-2 number, since 2×1979705928² = 7838471122716682368, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1979705921) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 105550 + ... + 122882.

It is an arithmetic number, because the mean of its divisors is an integer number (154705950).

Almost surely, 2^1979705928 is an apocalyptic number.

It is an amenable number.

1979705928 is an abundant number, since it is smaller than the sum of its proper divisors (2970884472).

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

1979705928 is a wasteful number, since it uses less digits than its factorization.

1979705928 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22101 (or 22097 counting only the distinct ones).

The product of its (nonzero) digits is 2857680, while the sum is 57.

The square root of 1979705928 is about 44493.8864115060. The cubic root of 1979705928 is about 1255.6450661791.

The spelling of 1979705928 in words is "one billion, nine hundred seventy-nine million, seven hundred five thousand, nine hundred twenty-eight".