99812040 has 64 divisors (see below), whose sum is σ = 306754560. Its totient is φ = 25966080.

The previous prime is 99812039. The next prime is 99812071. The reversal of 99812040 is 4021899.

It is a junction number, because it is equal to n+sod(n) for n = 99811992 and 99812010.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5224 + ... + 15063.

It is an arithmetic number, because the mean of its divisors is an integer number (4793040).

Almost surely, 2^99812040 is an apocalyptic number.

It is an amenable number.

99812040 is an abundant number, since it is smaller than the sum of its proper divisors (206942520).

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

99812040 is a wasteful number, since it uses less digits than its factorization.

99812040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20342 (or 20338 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 33.

The square root of 99812040 is about 9990.5975797246. The cubic root of 99812040 is about 463.8678899556.

It can be divided in two parts, 9981 and 2040, that added together give a palindrome (12021).

The spelling of 99812040 in words is "ninety-nine million, eight hundred twelve thousand, forty".