99031040 has 96 divisors (see below), whose sum is σ = 250614000. Its totient is φ = 37453824.

The previous prime is 99031007. The next prime is 99031043. The reversal of 99031040 is 4013099.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99031043) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 194306 + ... + 194814.

Almost surely, 2^99031040 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 99031040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (125307000).

99031040 is an abundant number, since it is smaller than the sum of its proper divisors (151582960).

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

99031040 is a wasteful number, since it uses less digits than its factorization.

99031040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 555 (or 535 counting only the distinct ones).

The product of its (nonzero) digits is 972, while the sum is 26.

The square root of 99031040 is about 9951.4340675101. The cubic root of 99031040 is about 462.6548436972.

The spelling of 99031040 in words is "ninety-nine million, thirty-one thousand, forty".