99870720 has 96 divisors (see below), whose sum is σ = 319606560. Its totient is φ = 26624000.

The previous prime is 99870703. The next prime is 99870739. The reversal of 99870720 is 2707899.

It is a tau number, because it is divible by the number of its divisors (96).

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, 29095 + ... + 32345.

It is an arithmetic number, because the mean of its divisors is an integer number (3329235).

Almost surely, 2^99870720 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 99870720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (159803280).

99870720 is an abundant number, since it is smaller than the sum of its proper divisors (219735840).

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

99870720 is a wasteful number, since it uses less digits than its factorization.

99870720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3281 (or 3261 counting only the distinct ones).

The product of its (nonzero) digits is 63504, while the sum is 42.

The square root of 99870720 is about 9993.5339094837. The cubic root of 99870720 is about 463.9587755686.

The spelling of 99870720 in words is "ninety-nine million, eight hundred seventy thousand, seven hundred twenty".