99280638 has 24 divisors (see below), whose sum is σ = 219686688. Its totient is φ = 32389152.

The previous prime is 99280633. The next prime is 99280651. The reversal of 99280638 is 83608299.

99280638 is a `hidden beast` number, since 9 + 9 + 2 + 8 + 0 + 638 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 99280593 and 99280602.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99280633) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 57831 + ... + 59522.

It is an arithmetic number, because the mean of its divisors is an integer number (9153612).

Almost surely, 2^99280638 is an apocalyptic number.

99280638 is an abundant number, since it is smaller than the sum of its proper divisors (120406050).

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

99280638 is a wasteful number, since it uses less digits than its factorization.

99280638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 117408 (or 117405 counting only the distinct ones).

The product of its (nonzero) digits is 186624, while the sum is 45.

The square root of 99280638 is about 9963.9669810774. The cubic root of 99280638 is about 463.0432096161.

The spelling of 99280638 in words is "ninety-nine million, two hundred eighty thousand, six hundred thirty-eight".