89931280 has 20 divisors (see below), whose sum is σ = 209090412. Its totient is φ = 35972480.

The previous prime is 89931251. The next prime is 89931307. The reversal of 89931280 is 8213998.

It can be written as a sum of positive squares in 2 ways, for example, as 63552784 + 26378496 = 7972^2 + 5136^2 .

It is a tau number, because it is divible by the number of its divisors (20).

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 561991 + ... + 562150.

Almost surely, 2^89931280 is an apocalyptic number.

89931280 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

89931280 is an abundant number, since it is smaller than the sum of its proper divisors (119159132).

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

89931280 is a wasteful number, since it uses less digits than its factorization.

89931280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1124154 (or 1124148 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 40.

The square root of 89931280 is about 9483.2104268544. The cubic root of 89931280 is about 448.0263855633.

The spelling of 89931280 in words is "eighty-nine million, nine hundred thirty-one thousand, two hundred eighty".