89740728 has 96 divisors (see below), whose sum is σ = 303039360. Its totient is φ = 23307840.

The previous prime is 89740709. The next prime is 89740751. The reversal of 89740728 is 82704798.

It is a congruent number.

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, 2550 + ... + 13637.

It is an arithmetic number, because the mean of its divisors is an integer number (3156660).

Almost surely, 2^89740728 is an apocalyptic number.

89740728 is a gapful number since it is divisible by the number (88) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 89740728, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (151519680).

89740728 is an abundant number, since it is smaller than the sum of its proper divisors (213298632).

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

89740728 is a wasteful number, since it uses less digits than its factorization.

89740728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16217 (or 16210 counting only the distinct ones).

The product of its (nonzero) digits is 225792, while the sum is 45.

The square root of 89740728 is about 9473.1582906653. The cubic root of 89740728 is about 447.7097263975.

The spelling of 89740728 in words is "eighty-nine million, seven hundred forty thousand, seven hundred twenty-eight".