99951588 has 72 divisors (see below), whose sum is σ = 279036576. Its totient is φ = 29913600.

The previous prime is 99951569. The next prime is 99951601. The reversal of 99951588 is 88515999.

99951588 is a `hidden beast` number, since 9 + 9 + 9 + 51 + 588 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 31348 + ... + 34388.

It is an arithmetic number, because the mean of its divisors is an integer number (3875508).

Almost surely, 2^99951588 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 99951588, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (139518288).

99951588 is an abundant number, since it is smaller than the sum of its proper divisors (179084988).

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

99951588 is a wasteful number, since it uses less digits than its factorization.

99951588 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3145 (or 3140 counting only the distinct ones).

The product of its digits is 1166400, while the sum is 54.

The square root of 99951588 is about 9997.5791069638. The cubic root of 99951588 is about 464.0839684045.

The spelling of 99951588 in words is "ninety-nine million, nine hundred fifty-one thousand, five hundred eighty-eight".