99331440 has 240 divisors, whose sum is σ = 348549120. Its totient is φ = 23362560.

The previous prime is 99331429. The next prime is 99331451. The reversal of 99331440 is 4413399.

It is an interprime number because it is at equal distance from previous prime (99331429) and next prime (99331451).

It is a tau number, because it is divible by the number of its divisors (240).

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, 1257321 + ... + 1257399.

It is an arithmetic number, because the mean of its divisors is an integer number (1452288).

Almost surely, 2^99331440 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 99331440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (174274560).

99331440 is an abundant number, since it is smaller than the sum of its proper divisors (249217680).

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

99331440 is a wasteful number, since it uses less digits than its factorization.

99331440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 152 (or 133 counting only the distinct ones).

The product of its (nonzero) digits is 11664, while the sum is 33.

The square root of 99331440 is about 9966.5159408893. The cubic root of 99331440 is about 463.1221760370.

The spelling of 99331440 in words is "ninety-nine million, three hundred thirty-one thousand, four hundred forty".