97199880 has 256 divisors, whose sum is σ = 335923200. Its totient is φ = 22364160.

The previous prime is 97199857. The next prime is 97199929. The reversal of 97199880 is 8899179.

It is a Cunningham number, because it is equal to 9859²-1.

It is a Harshad number since it is a multiple of its sum of digits (51).

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1833934 + ... + 1833986.

It is an arithmetic number, because the mean of its divisors is an integer number (1312200).

Almost surely, 2^97199880 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 97199880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (167961600).

97199880 is an abundant number, since it is smaller than the sum of its proper divisors (238723320).

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

97199880 is a wasteful number, since it uses less digits than its factorization.

97199880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 144 (or 140 counting only the distinct ones).

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

The square root of 97199880 is about 9858.9999492849. Note that the first 4 decimals coincide. The cubic root of 97199880 is about 459.7854702238.

The spelling of 97199880 in words is "ninety-seven million, one hundred ninety-nine thousand, eight hundred eighty".