99604890 has 160 divisors (see below), whose sum is σ = 334122624. Its totient is φ = 20684160.

The previous prime is 99604877. The next prime is 99604913. The reversal of 99604890 is 9840699.

It is a super-2 number, since 2×99604890² = 19842268223824200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a Curzon number.

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, 61572 + ... + 63168.

Almost surely, 2^99604890 is an apocalyptic number.

99604890 is a gapful number since it is divisible by the number (90) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 99604890, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (167061312).

99604890 is an abundant number, since it is smaller than the sum of its proper divisors (234517734).

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

99604890 is a wasteful number, since it uses less digits than its factorization.

99604890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1634 (or 1625 counting only the distinct ones).

The product of its (nonzero) digits is 139968, while the sum is 45.

The square root of 99604890 is about 9980.2249473647. The cubic root of 99604890 is about 463.5467637487.

The spelling of 99604890 in words is "ninety-nine million, six hundred four thousand, eight hundred ninety".