1931088990 has 32 divisors (see below), whose sum is σ = 4907239200. Its totient is φ = 484665344.

The previous prime is 1931088989. The next prime is 1931089003. The reversal of 1931088990 is 998801391.

It is a Curzon number.

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, 1892715 + ... + 1893734.

It is an arithmetic number, because the mean of its divisors is an integer number (153351225).

Almost surely, 2^1931088990 is an apocalyptic number.

1931088990 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1931088990 is an abundant number, since it is smaller than the sum of its proper divisors (2976150210).

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

1931088990 is a wasteful number, since it uses less digits than its factorization.

1931088990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3786476.

The product of its (nonzero) digits is 139968, while the sum is 48.

The square root of 1931088990 is about 43944.1576321586. The cubic root of 1931088990 is about 1245.2811932394.

The spelling of 1931088990 in words is "one billion, nine hundred thirty-one million, eighty-eight thousand, nine hundred ninety".