99142388 has 24 divisors (see below), whose sum is σ = 179221224. Its totient is φ = 47952000.

The previous prime is 99142349. The next prime is 99142403. The reversal of 99142388 is 88324199.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 5207524 + 93934864 = 2282^2 + 9692^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24938 + ... + 28638.

It is an arithmetic number, because the mean of its divisors is an integer number (7467551).

Almost surely, 2^99142388 is an apocalyptic number.

It is an amenable number.

99142388 is a deficient number, since it is larger than the sum of its proper divisors (80078836).

99142388 is a wasteful number, since it uses less digits than its factorization.

99142388 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3923 (or 3921 counting only the distinct ones).

The product of its digits is 124416, while the sum is 44.

The square root of 99142388 is about 9957.0270663487. The cubic root of 99142388 is about 462.8281778893.

The spelling of 99142388 in words is "ninety-nine million, one hundred forty-two thousand, three hundred eighty-eight".