99897880 has 16 divisors (see below), whose sum is σ = 224770320. Its totient is φ = 39959136.

The previous prime is 99897773. The next prime is 99897881. The reversal of 99897880 is 8879899.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99897881) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1248684 + ... + 1248763.

It is an arithmetic number, because the mean of its divisors is an integer number (14048145).

Almost surely, 2^99897880 is an apocalyptic number.

It is an amenable number.

99897880 is an abundant number, since it is smaller than the sum of its proper divisors (124872440).

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

99897880 is a wasteful number, since it uses less digits than its factorization.

99897880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2497458 (or 2497454 counting only the distinct ones).

The product of its (nonzero) digits is 2612736, while the sum is 58.

The square root of 99897880 is about 9994.8926957722. The cubic root of 99897880 is about 464.0008298638. Note that the first 3 decimals are identical.

The spelling of 99897880 in words is "ninety-nine million, eight hundred ninety-seven thousand, eight hundred eighty".