89987940 has 72 divisors (see below), whose sum is σ = 311962560. Its totient is φ = 20568384.

The previous prime is 89987929. The next prime is 89988001. The reversal of 89987940 is 4978998.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 34450 + ... + 36969.

Almost surely, 2^89987940 is an apocalyptic number.

It is an amenable number.

89987940 is an abundant number, since it is smaller than the sum of its proper divisors (221974620).

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

89987940 is a wasteful number, since it uses less digits than its factorization.

89987940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71441 (or 71436 counting only the distinct ones).

The product of its (nonzero) digits is 1306368, while the sum is 54.

The square root of 89987940 is about 9486.1973414008. The cubic root of 89987940 is about 448.1204568204.

The spelling of 89987940 in words is "eighty-nine million, nine hundred eighty-seven thousand, nine hundred forty".