1989910475 has 24 divisors (see below), whose sum is σ = 2853984000. Its totient is φ = 1348060320.

The previous prime is 1989910427. The next prime is 1989910499. The reversal of 1989910475 is 5740199891.

It is not a de Polignac number, because 1989910475 - 2⁶ = 1989910411 is a prime.

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, 53975 + ... + 83024.

It is an arithmetic number, because the mean of its divisors is an integer number (118916000).

Almost surely, 2^1989910475 is an apocalyptic number.

1989910475 is a deficient number, since it is larger than the sum of its proper divisors (864073525).

1989910475 is a wasteful number, since it uses less digits than its factorization.

1989910475 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 137099 (or 137094 counting only the distinct ones).

The product of its (nonzero) digits is 816480, while the sum is 53.

The square root of 1989910475 is about 44608.4126034541. The cubic root of 1989910475 is about 1257.7988096629.

The spelling of 1989910475 in words is "one billion, nine hundred eighty-nine million, nine hundred ten thousand, four hundred seventy-five".