99900280 has 32 divisors (see below), whose sum is σ = 225473040. Its totient is φ = 39836160.

The previous prime is 99900253. The next prime is 99900301. The reversal of 99900280 is 8200999.

It is a Smith number, since the sum of its digits (37) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9775 + ... + 17185.

Almost surely, 2^99900280 is an apocalyptic number.

It is an amenable number.

99900280 is an abundant number, since it is smaller than the sum of its proper divisors (125572760).

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

99900280 is a wasteful number, since it uses less digits than its factorization.

99900280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7759 (or 7755 counting only the distinct ones).

The product of its (nonzero) digits is 11664, while the sum is 37.

The square root of 99900280 is about 9995.0127563700. The cubic root of 99900280 is about 464.0045456352.

The spelling of 99900280 in words is "ninety-nine million, nine hundred thousand, two hundred eighty".