99642380 has 12 divisors (see below), whose sum is σ = 209249040. Its totient is φ = 39856944.

The previous prime is 99642343. The next prime is 99642407. The reversal of 99642380 is 8324699.

It is a happy number.

It is a hoax number, since the sum of its digits (41) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2491040 + ... + 2491079.

It is an arithmetic number, because the mean of its divisors is an integer number (17437420).

Almost surely, 2^99642380 is an apocalyptic number.

It is an amenable number.

99642380 is an abundant number, since it is smaller than the sum of its proper divisors (109606660).

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

99642380 is a wasteful number, since it uses less digits than its factorization.

99642380 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4982128 (or 4982126 counting only the distinct ones).

The product of its (nonzero) digits is 93312, while the sum is 41.

The square root of 99642380 is about 9982.1029848424. The cubic root of 99642380 is about 463.6049141344.

The spelling of 99642380 in words is "ninety-nine million, six hundred forty-two thousand, three hundred eighty".