89256640 has 56 divisors (see below), whose sum is σ = 231873552. Its totient is φ = 32455680.

The previous prime is 89256599. The next prime is 89256641. The reversal of 89256640 is 4665298.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a junction number, because it is equal to n+sod(n) for n = 89256593 and 89256602.

It is not an unprimeable number, because it can be changed into a prime (89256641) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9159 + ... + 16198.

Almost surely, 2^89256640 is an apocalyptic number.

89256640 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

89256640 is an abundant number, since it is smaller than the sum of its proper divisors (142616912).

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

89256640 is a wasteful number, since it uses less digits than its factorization.

89256640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25385 (or 25375 counting only the distinct ones).

The product of its (nonzero) digits is 103680, while the sum is 40.

The square root of 89256640 is about 9447.5732333759. The cubic root of 89256640 is about 446.9032483488.

The spelling of 89256640 in words is "eighty-nine million, two hundred fifty-six thousand, six hundred forty".