99231040 has 168 divisors, whose sum is σ = 266684760. Its totient is φ = 35094528.

The previous prime is 99231001. The next prime is 99231049. The reversal of 99231040 is 4013299.

99231040 = 436² + 437² + ... + 724².

It is a happy number.

It can be written as a sum of positive squares in 12 ways, for example, as 506944 + 98724096 = 712^2 + 9936^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99231049) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2681902 + ... + 2681938.

Almost surely, 2^99231040 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 99231040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (133342380).

99231040 is an abundant number, since it is smaller than the sum of its proper divisors (167453720).

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

99231040 is a wasteful number, since it uses less digits than its factorization.

99231040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 117 (or 90 counting only the distinct ones).

The product of its (nonzero) digits is 1944, while the sum is 28.

The square root of 99231040 is about 9961.4778020131. The cubic root of 99231040 is about 462.9660886955.

The spelling of 99231040 in words is "ninety-nine million, two hundred thirty-one thousand, forty".