99195840 has 280 divisors, whose sum is σ = 365119920. Its totient is φ = 25546752.

The previous prime is 99195839. The next prime is 99195847. The reversal of 99195840 is 4859199.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99195847) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 1114516 + ... + 1114604.

Almost surely, 2^99195840 is an apocalyptic number.

99195840 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 99195840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (182559960).

99195840 is an abundant number, since it is smaller than the sum of its proper divisors (265924080).

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

99195840 is a wasteful number, since it uses less digits than its factorization.

99195840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 161 (or 142 counting only the distinct ones).

The product of its (nonzero) digits is 116640, while the sum is 45.

The square root of 99195840 is about 9959.7108391760. The cubic root of 99195840 is about 462.9113399206.

The spelling of 99195840 in words is "ninety-nine million, one hundred ninety-five thousand, eight hundred forty".