99939040 has 48 divisors (see below), whose sum is σ = 243734400. Its totient is φ = 38684160.

The previous prime is 99939023. The next prime is 99939041. The reversal of 99939040 is 4093999.

It is a super-2 number, since 2×99939040² = 19975623432243200, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99939041) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5115 + ... + 15034.

It is an arithmetic number, because the mean of its divisors is an integer number (5077800).

Almost surely, 2^99939040 is an apocalyptic number.

It is an amenable number.

99939040 is an abundant number, since it is smaller than the sum of its proper divisors (143795360).

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

99939040 is a wasteful number, since it uses less digits than its factorization.

99939040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20195 (or 20187 counting only the distinct ones).

The product of its (nonzero) digits is 78732, while the sum is 43.

The square root of 99939040 is about 9996.9515353432. The cubic root of 99939040 is about 464.0645471045.

The spelling of 99939040 in words is "ninety-nine million, nine hundred thirty-nine thousand, forty".