99501858 has 40 divisors (see below), whose sum is σ = 226635420. Its totient is φ = 32620320.

The previous prime is 99501851. The next prime is 99501863. The reversal of 99501858 is 85810599.

99501858 is a `hidden beast` number, since 99 + 501 + 8 + 58 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 82137969 + 17363889 = 9063^2 + 4167^2 .

It is not an unprimeable number, because it can be changed into a prime (99501851) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 4848 + ... + 14916.

Almost surely, 2^99501858 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 99501858, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (113317710).

99501858 is an abundant number, since it is smaller than the sum of its proper divisors (127133562).

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

99501858 is a wasteful number, since it uses less digits than its factorization.

99501858 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10144 (or 10135 counting only the distinct ones).

The product of its (nonzero) digits is 129600, while the sum is 45.

The square root of 99501858 is about 9975.0618043198. The cubic root of 99501858 is about 463.3868765938.

The spelling of 99501858 in words is "ninety-nine million, five hundred one thousand, eight hundred fifty-eight".