89231640 has 192 divisors, whose sum is σ = 297077760. Its totient is φ = 21411840.

The previous prime is 89231633. The next prime is 89231663. The reversal of 89231640 is 4613298.

It is a hoax number, since the sum of its digits (33) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1075039 + ... + 1075121.

It is an arithmetic number, because the mean of its divisors is an integer number (1547280).

Almost surely, 2^89231640 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 89231640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (148538880).

89231640 is an abundant number, since it is smaller than the sum of its proper divisors (207846120).

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

89231640 is a wasteful number, since it uses less digits than its factorization.

89231640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 162 (or 141 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 33.

The square root of 89231640 is about 9446.2500496229. The cubic root of 89231640 is about 446.8615198959.

The spelling of 89231640 in words is "eighty-nine million, two hundred thirty-one thousand, six hundred forty".