1020920880 has 120 divisors (see below), whose sum is σ = 3681608112. Its totient is φ = 233350656.

The previous prime is 1020920809. The next prime is 1020920893. The reversal of 1020920880 is 880290201.

It is a tau number, because it is divible by the number of its divisors (120).

It is a Harshad number since it is a multiple of its sum of digits (30).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 31647 + ... + 55166.

Almost surely, 2^1020920880 is an apocalyptic number.

1020920880 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1020920880 is an abundant number, since it is smaller than the sum of its proper divisors (2660687232).

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

1020920880 is a wasteful number, since it uses less digits than its factorization.

1020920880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 86843 (or 86830 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 30.

The square root of 1020920880 is about 31951.8525284529. The cubic root of 1020920880 is about 1006.9255526629.

The spelling of 1020920880 in words is "one billion, twenty million, nine hundred twenty thousand, eight hundred eighty".