1087638668 has 24 divisors (see below), whose sum is σ = 1923543552. Its totient is φ = 538078464.

The previous prime is 1087638659. The next prime is 1087638677. The reversal of 1087638668 is 8668367801.

It is an interprime number because it is at equal distance from previous prime (1087638659) and next prime (1087638677).

It is a Smith number, since the sum of its digits (53) coincides with the sum of the digits of its prime factors.

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, 198980 + ... + 204372.

It is an arithmetic number, because the mean of its divisors is an integer number (80147648).

Almost surely, 2^1087638668 is an apocalyptic number.

It is an amenable number.

1087638668 is a deficient number, since it is larger than the sum of its proper divisors (835904884).

1087638668 is a wasteful number, since it uses less digits than its factorization.

1087638668 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5921 (or 5919 counting only the distinct ones).

The product of its (nonzero) digits is 2322432, while the sum is 53.

The square root of 1087638668 is about 32979.3673074545. The cubic root of 1087638668 is about 1028.3987650390.

The spelling of 1087638668 in words is "one billion, eighty-seven million, six hundred thirty-eight thousand, six hundred sixty-eight".