99315720 has 320 divisors, whose sum is σ = 397267200. Its totient is φ = 21772800.

The previous prime is 99315709. The next prime is 99315731. The reversal of 99315720 is 2751399.

It is an interprime number because it is at equal distance from previous prime (99315709) and next prime (99315731).

It is a super-2 number, since 2×99315720² = 19727224478236800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 657645 + ... + 657795.

It is an arithmetic number, because the mean of its divisors is an integer number (1241460).

Almost surely, 2^99315720 is an apocalyptic number.

99315720 is a gapful number since it is divisible by the number (90) 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 99315720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (198633600).

99315720 is an abundant number, since it is smaller than the sum of its proper divisors (297951480).

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

99315720 is a wasteful number, since it uses less digits than its factorization.

99315720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 210 (or 197 counting only the distinct ones).

The product of its (nonzero) digits is 17010, while the sum is 36.

The square root of 99315720 is about 9965.7272689955. The cubic root of 99315720 is about 463.0977438105.

It can be divided in two parts, 9931 and 5720, that added together give a palindrome (15651).

The spelling of 99315720 in words is "ninety-nine million, three hundred fifteen thousand, seven hundred twenty".