89663640 has 64 divisors (see below), whose sum is σ = 293448960. Its totient is φ = 21736320.

The previous prime is 89663633. The next prime is 89663647. The reversal of 89663640 is 4636698.

It is an interprime number because it is at equal distance from previous prime (89663633) and next prime (89663647).

It is a junction number, because it is equal to n+sod(n) for n = 89663592 and 89663601.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (89663647) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 32644 + ... + 35283.

It is an arithmetic number, because the mean of its divisors is an integer number (4585140).

Almost surely, 2^89663640 is an apocalyptic number.

It is an amenable number.

89663640 is an abundant number, since it is smaller than the sum of its proper divisors (203785320).

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

89663640 is a wasteful number, since it uses less digits than its factorization.

89663640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67952 (or 67948 counting only the distinct ones).

The product of its (nonzero) digits is 186624, while the sum is 42.

The square root of 89663640 is about 9469.0886573102. The cubic root of 89663640 is about 447.5814942663.

The spelling of 89663640 in words is "eighty-nine million, six hundred sixty-three thousand, six hundred forty".