89139960 has 256 divisors, whose sum is σ = 366105600. Its totient is φ = 18786816.

The previous prime is 89139943. The next prime is 89139961. The reversal of 89139960 is 6993198.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (89139961) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 97827 + ... + 98733.

It is an arithmetic number, because the mean of its divisors is an integer number (1430100).

Almost surely, 2^89139960 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 89139960, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (183052800).

89139960 is an abundant number, since it is smaller than the sum of its proper divisors (276965640).

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

89139960 is a wasteful number, since it uses less digits than its factorization.

89139960 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 947 (or 937 counting only the distinct ones).

The product of its (nonzero) digits is 104976, while the sum is 45.

The square root of 89139960 is about 9441.3960832072. The cubic root of 89139960 is about 446.7084265800.

The spelling of 89139960 in words is "eighty-nine million, one hundred thirty-nine thousand, nine hundred sixty".