1089685964 has 24 divisors (see below), whose sum is σ = 1961847888. Its totient is φ = 529208640.

The previous prime is 1089685957. The next prime is 1089685981. The reversal of 1089685964 is 4695869801.

It is a happy number.

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, 84719 + ... + 96729.

It is an arithmetic number, because the mean of its divisors is an integer number (81743662).

Almost surely, 2^1089685964 is an apocalyptic number.

It is an amenable number.

1089685964 is a deficient number, since it is larger than the sum of its proper divisors (872161924).

1089685964 is a wasteful number, since it uses less digits than its factorization.

1089685964 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12665 (or 12663 counting only the distinct ones).

The product of its (nonzero) digits is 3732480, while the sum is 56.

The square root of 1089685964 is about 33010.3917577480. The cubic root of 1089685964 is about 1029.0436228938.

The spelling of 1089685964 in words is "one billion, eighty-nine million, six hundred eighty-five thousand, nine hundred sixty-four".