1089236656 has 20 divisors (see below), whose sum is σ = 2155299552. Its totient is φ = 533030336.

The previous prime is 1089236653. The next prime is 1089236657. The reversal of 1089236656 is 6566329801.

It is not an unprimeable number, because it can be changed into a prime (1089236651) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 723475 + ... + 724978.

Almost surely, 2^1089236656 is an apocalyptic number.

1089236656 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1089236656 is a deficient number, since it is larger than the sum of its proper divisors (1066062896).

1089236656 is a wasteful number, since it uses less digits than its factorization.

1089236656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1448508 (or 1448502 counting only the distinct ones).

The product of its (nonzero) digits is 466560, while the sum is 46.

The square root of 1089236656 is about 33003.5855021845. The cubic root of 1089236656 is about 1028.9021689613.

The spelling of 1089236656 in words is "one billion, eighty-nine million, two hundred thirty-six thousand, six hundred fifty-six".