1990975888 has 40 divisors (see below), whose sum is σ = 4234077216. Its totient is φ = 899424000.

The previous prime is 1990975873. The next prime is 1990975907. The reversal of 1990975888 is 8885790991.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6013 + ... + 63388.

Almost surely, 2^1990975888 is an apocalyptic number.

It is an amenable number.

1990975888 is an abundant number, since it is smaller than the sum of its proper divisors (2243101328).

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

1990975888 is a wasteful number, since it uses less digits than its factorization.

1990975888 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69583 (or 69577 counting only the distinct ones).

The product of its (nonzero) digits is 13063680, while the sum is 64.

The square root of 1990975888 is about 44620.3528448622. The cubic root of 1990975888 is about 1258.0232479193.

The spelling of 1990975888 in words is "one billion, nine hundred ninety million, nine hundred seventy-five thousand, eight hundred eighty-eight".