99000078 has 32 divisors (see below), whose sum is σ = 213614496. Its totient is φ = 30471168.

The previous prime is 99000059. The next prime is 99000079. The reversal of 99000078 is 87000099.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99000079) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3751 + ... + 14562.

It is an arithmetic number, because the mean of its divisors is an integer number (6675453).

Almost surely, 2^99000078 is an apocalyptic number.

99000078 is an abundant number, since it is smaller than the sum of its proper divisors (114614418).

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

99000078 is a wasteful number, since it uses less digits than its factorization.

99000078 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18388.

The product of its (nonzero) digits is 4536, while the sum is 33.

The square root of 99000078 is about 9949.8782907129. The cubic root of 99000078 is about 462.6066224109.

The spelling of 99000078 in words is "ninety-nine million, seventy-eight", and thus it is an aban number and an uban number.