89744640 has 72 divisors (see below), whose sum is σ = 286634208. Its totient is φ = 23930880.

The previous prime is 89744617. The next prime is 89744701. The reversal of 89744640 is 4644798.

It is a junction number, because it is equal to n+sod(n) for n = 89744592 and 89744601.

It is a congruent 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, 7846 + ... + 15525.

Almost surely, 2^89744640 is an apocalyptic number.

89744640 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

89744640 is an abundant number, since it is smaller than the sum of its proper divisors (196889568).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

89744640 is a wasteful number, since it uses less digits than its factorization.

89744640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23395 (or 23381 counting only the distinct ones).

The product of its (nonzero) digits is 193536, while the sum is 42.

The square root of 89744640 is about 9473.3647665441. The cubic root of 89744640 is about 447.7162318607.

The spelling of 89744640 in words is "eighty-nine million, seven hundred forty-four thousand, six hundred forty".