99899670 has 64 divisors (see below), whose sum is σ = 266563584. Its totient is φ = 23794560.

The previous prime is 99899659. The next prime is 99899671. The reversal of 99899670 is 7699899.

It is a super-2 number, since 2×99899670² = 19959888132217800, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 99899670.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99899671) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 7959 + ... + 16221.

It is an arithmetic number, because the mean of its divisors is an integer number (4165056).

Almost surely, 2^99899670 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 99899670, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (133281792).

99899670 is an abundant number, since it is smaller than the sum of its proper divisors (166663914).

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

99899670 is a wasteful number, since it uses less digits than its factorization.

99899670 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8317.

The product of its (nonzero) digits is 2204496, while the sum is 57.

The square root of 99899670 is about 9994.9822411048. The cubic root of 99899670 is about 464.0036012156.

The spelling of 99899670 in words is "ninety-nine million, eight hundred ninety-nine thousand, six hundred seventy".