1087989904 has 20 divisors (see below), whose sum is σ = 2121411964. Its totient is φ = 540528768.

The previous prime is 1087989811. The next prime is 1087989941. The reversal of 1087989904 is 4099897801.

It can be written as a sum of positive squares in 2 ways, for example, as 162613504 + 925376400 = 12752^2 + 30420^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 214047 + ... + 219070.

Almost surely, 2^1087989904 is an apocalyptic number.

It is an amenable number.

1087989904 is a deficient number, since it is larger than the sum of its proper divisors (1033422060).

1087989904 is a wasteful number, since it uses less digits than its factorization.

1087989904 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 433282 (or 433276 counting only the distinct ones).

The product of its (nonzero) digits is 1306368, while the sum is 55.

The square root of 1087989904 is about 32984.6919646069. The cubic root of 1087989904 is about 1028.5094549227.

The spelling of 1087989904 in words is "one billion, eighty-seven million, nine hundred eighty-nine thousand, nine hundred four".