99143440 has 40 divisors (see below), whose sum is σ = 251466048. Its totient is φ = 36051840.

The previous prime is 99143413. The next prime is 99143441. The reversal of 99143440 is 4434199.

It is a tau number, because it is divible by the number of its divisors (40).

It is a Smith number, since the sum of its digits (34) coincides with the sum of the digits of its prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 99143396 and 99143405.

It is not an unprimeable number, because it can be changed into a prime (99143441) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 55452 + ... + 57211.

Almost surely, 2^99143440 is an apocalyptic number.

It is an amenable number.

99143440 is an abundant number, since it is smaller than the sum of its proper divisors (152322608).

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

99143440 is a wasteful number, since it uses less digits than its factorization.

99143440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 112687 (or 112681 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 34.

The square root of 99143440 is about 9957.0798932217. The cubic root of 99143440 is about 462.8298149070.

The spelling of 99143440 in words is "ninety-nine million, one hundred forty-three thousand, four hundred forty".