99193860 has 72 divisors (see below), whose sum is σ = 305050200. Its totient is φ = 26085888.

The previous prime is 99193837. The next prime is 99193867. The reversal of 99193860 is 6839199.

It can be written as a sum of positive squares in 4 ways, for example, as 26193924 + 72999936 = 5118^2 + 8544^2 .

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is not an unprimeable number, because it can be changed into a prime (99193867) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 9366 + ... + 16914.

Almost surely, 2^99193860 is an apocalyptic number.

99193860 is a gapful number since it is divisible by the number (90) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 99193860, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (152525100).

99193860 is an abundant number, since it is smaller than the sum of its proper divisors (205856340).

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

99193860 is a wasteful number, since it uses less digits than its factorization.

99193860 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7637 (or 7632 counting only the distinct ones).

The product of its (nonzero) digits is 104976, while the sum is 45.

The square root of 99193860 is about 9959.6114382038. The cubic root of 99193860 is about 462.9082599173.

The spelling of 99193860 in words is "ninety-nine million, one hundred ninety-three thousand, eight hundred sixty".