99078 has 24 divisors (see below), whose sum is σ = 231192. Its totient is φ = 28224.

The previous prime is 99053. The next prime is 99079. The reversal of 99078 is 87099.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99079) by changing a digit.

99078 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 126 + ... + 462.

It is an arithmetic number, because the mean of its divisors is an integer number (9633).

2⁹⁹⁰⁷⁸ is an apocalyptic number.

99078 is a gapful number since it is divisible by the number (98) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 99078, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (115596).

99078 is an abundant number, since it is smaller than the sum of its proper divisors (132114).

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

99078 is a wasteful number, since it uses less digits than its factorization.

99078 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 356 (or 349 counting only the distinct ones).

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

The square root of 99078 is about 314.7665801828. The cubic root of 99078 is about 46.2727961641.

The spelling of 99078 in words is "ninety-nine thousand, seventy-eight".