99904660 has 48 divisors (see below), whose sum is σ = 221860800. Its totient is φ = 37684224.

The previous prime is 99904643. The next prime is 99904667. The reversal of 99904660 is 6640999.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99904667) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 107076 + ... + 108004.

It is an arithmetic number, because the mean of its divisors is an integer number (4622100).

Almost surely, 2^99904660 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 99904660, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (110930400).

99904660 is an abundant number, since it is smaller than the sum of its proper divisors (121956140).

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

99904660 is a wasteful number, since it uses less digits than its factorization.

99904660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1240 (or 1238 counting only the distinct ones).

The product of its (nonzero) digits is 104976, while the sum is 43.

The square root of 99904660 is about 9995.2318632436. The cubic root of 99904660 is about 464.0113267647.

The spelling of 99904660 in words is "ninety-nine million, nine hundred four thousand, six hundred sixty".