89231440 has 40 divisors (see below), whose sum is σ = 208736640. Its totient is φ = 35473536.

The previous prime is 89231431. The next prime is 89231459. The reversal of 89231440 is 4413298.

It is a tau number, because it is divible by the number of its divisors (40).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10021 + ... + 16699.

It is an arithmetic number, because the mean of its divisors is an integer number (5218416).

Almost surely, 2^89231440 is an apocalyptic number.

89231440 is a gapful number since it is divisible by the number (80) 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 89231440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (104368320).

89231440 is an abundant number, since it is smaller than the sum of its proper divisors (119505200).

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

89231440 is a wasteful number, since it uses less digits than its factorization.

89231440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6859 (or 6853 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 31.

The square root of 89231440 is about 9446.2394634055. The cubic root of 89231440 is about 446.8611860369.

The spelling of 89231440 in words is "eighty-nine million, two hundred thirty-one thousand, four hundred forty".