99199440 has 60 divisors (see below), whose sum is σ = 333147204. Its totient is φ = 26452992.

The previous prime is 99199439. The next prime is 99199447. The reversal of 99199440 is 4499199.

It can be written as a sum of positive squares in 2 ways, for example, as 15586704 + 83612736 = 3948^2 + 9144^2 .

It is a tau number, because it is divible by the number of its divisors (60).

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 (99199447) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 68169 + ... + 69608.

Almost surely, 2^99199440 is an apocalyptic number.

99199440 is a gapful number since it is divisible by the number (90) formed by its first and last digit.

It is an amenable number.

99199440 is an abundant number, since it is smaller than the sum of its proper divisors (233947764).

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

99199440 is a wasteful number, since it uses less digits than its factorization.

99199440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 137796 (or 137787 counting only the distinct ones).

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

The square root of 99199440 is about 9959.8915656748. The cubic root of 99199440 is about 462.9169398216.

The spelling of 99199440 in words is "ninety-nine million, one hundred ninety-nine thousand, four hundred forty".