1021092990 has 32 divisors (see below), whose sum is σ = 2454744096. Its totient is φ = 271833600.

The previous prime is 1021092967. The next prime is 1021093019. The reversal of 1021092990 is 992901201.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10287 + ... + 46346.

It is an arithmetic number, because the mean of its divisors is an integer number (76710753).

Almost surely, 2^1021092990 is an apocalyptic number.

1021092990 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1021092990 is an abundant number, since it is smaller than the sum of its proper divisors (1433651106).

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

1021092990 is a wasteful number, since it uses less digits than its factorization.

1021092990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57244.

The product of its (nonzero) digits is 2916, while the sum is 33.

The square root of 1021092990 is about 31954.5456860209. The cubic root of 1021092990 is about 1006.9821330250.

The spelling of 1021092990 in words is "one billion, twenty-one million, ninety-two thousand, nine hundred ninety".