99649680 has 240 divisors, whose sum is σ = 358935360. Its totient is φ = 22671360.

The previous prime is 99649679. The next prime is 99649727. The reversal of 99649680 is 8694699.

It is a tau number, because it is divible by the number of its divisors (240).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2430460 + ... + 2430500.

It is an arithmetic number, because the mean of its divisors is an integer number (1495564).

Almost surely, 2^99649680 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 99649680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (179467680).

99649680 is an abundant number, since it is smaller than the sum of its proper divisors (259285680).

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

99649680 is a wasteful number, since it uses less digits than its factorization.

99649680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 130 (or 83 counting only the distinct ones).

The product of its (nonzero) digits is 839808, while the sum is 51.

The square root of 99649680 is about 9982.4686325578. The cubic root of 99649680 is about 463.6162353989.

The spelling of 99649680 in words is "ninety-nine million, six hundred forty-nine thousand, six hundred eighty".