99740520 has 192 divisors, whose sum is σ = 358862400. Its totient is φ = 23823360.

The previous prime is 99740507. The next prime is 99740549. The reversal of 99740520 is 2504799.

99740520 is a `hidden beast` number, since 9 + 97 + 40 + 520 = 666.

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

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, 352299 + ... + 352581.

It is an arithmetic number, because the mean of its divisors is an integer number (1869075).

Almost surely, 2^99740520 is an apocalyptic number.

99740520 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 99740520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (179431200).

99740520 is an abundant number, since it is smaller than the sum of its proper divisors (259121880).

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

99740520 is a wasteful number, since it uses less digits than its factorization.

99740520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 400 (or 393 counting only the distinct ones).

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

The square root of 99740520 is about 9987.0175728292. The cubic root of 99740520 is about 463.7570691279.

The spelling of 99740520 in words is "ninety-nine million, seven hundred forty thousand, five hundred twenty".