99407520 has 96 divisors (see below), whose sum is σ = 347941440. Its totient is φ = 26507520.

The previous prime is 99407513. The next prime is 99407527. The reversal of 99407520 is 2570499.

99407520 is a `hidden beast` number, since 99 + 40 + 7 + 520 = 666.

It is an interprime number because it is at equal distance from previous prime (99407513) and next prime (99407527).

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

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

It is not an unprimeable number, because it can be changed into a prime (99407527) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7186 + ... + 15825.

It is an arithmetic number, because the mean of its divisors is an integer number (3624390).

Almost surely, 2^99407520 is an apocalyptic number.

99407520 is a gapful number since it is divisible by the number (90) formed by its first and last digit.

It is an amenable number.

99407520 is an abundant number, since it is smaller than the sum of its proper divisors (248533920).

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

99407520 is a wasteful number, since it uses less digits than its factorization.

99407520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23035 (or 23021 counting only the distinct ones).

The product of its (nonzero) digits is 22680, while the sum is 36.

The square root of 99407520 is about 9970.3319904605. The cubic root of 99407520 is about 463.2403841404.

The spelling of 99407520 in words is "ninety-nine million, four hundred seven thousand, five hundred twenty".