99178980 has 48 divisors (see below), whose sum is σ = 279432384. Its totient is φ = 26282880.

The previous prime is 99178957. The next prime is 99178987. The reversal of 99178980 is 8987199.

It is not an unprimeable number, because it can be changed into a prime (99178987) 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, 4710 + ... + 14850.

It is an arithmetic number, because the mean of its divisors is an integer number (5821508).

Almost surely, 2^99178980 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 99178980, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (139716192).

99178980 is an abundant number, since it is smaller than the sum of its proper divisors (180253404).

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

99178980 is a wasteful number, since it uses less digits than its factorization.

99178980 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10316 (or 10314 counting only the distinct ones).

The product of its (nonzero) digits is 326592, while the sum is 51.

The square root of 99178980 is about 9958.8643930922. The cubic root of 99178980 is about 462.8851119141.

The spelling of 99178980 in words is "ninety-nine million, one hundred seventy-eight thousand, nine hundred eighty".