99987650 has 48 divisors (see below), whose sum is σ = 219896640. Its totient is φ = 33096000.

The previous prime is 99987619. The next prime is 99987683. The reversal of 99987650 is 5678999.

It is a Smith number, since the sum of its digits (53) coincides with the sum of the digits of its prime factors.

It is a nialpdrome in base 10.

It is a junction number, because it is equal to n+sod(n) for n = 99987592 and 99987601.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5225 + ... + 15075.

It is an arithmetic number, because the mean of its divisors is an integer number (4581180).

Almost surely, 2^99987650 is an apocalyptic number.

99987650 is an abundant number, since it is smaller than the sum of its proper divisors (119908990).

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

99987650 is a wasteful number, since it uses less digits than its factorization.

99987650 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9899 (or 9894 counting only the distinct ones).

The product of its (nonzero) digits is 1224720, while the sum is 53.

The square root of 99987650 is about 9999.3824809335. The cubic root of 99987650 is about 464.1397747006.

The spelling of 99987650 in words is "ninety-nine million, nine hundred eighty-seven thousand, six hundred fifty".