99000040 has 32 divisors (see below), whose sum is σ = 225261000. Its totient is φ = 39153664.

The previous prime is 99000037. The next prime is 99000047. The reversal of 99000040 is 4000099.

It can be written as a sum of positive squares in 4 ways, for example, as 74338884 + 24661156 = 8622^2 + 4966^2 .

It is a junction number, because it is equal to n+sod(n) for n = 98999975 and 99000020.

It is not an unprimeable number, because it can be changed into a prime (99000047) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10345 + ... + 17464.

Almost surely, 2^99000040 is an apocalyptic number.

It is an amenable number.

99000040 is an abundant number, since it is smaller than the sum of its proper divisors (126260960).

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

99000040 is a wasteful number, since it uses less digits than its factorization.

99000040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27909 (or 27905 counting only the distinct ones).

The product of its (nonzero) digits is 324, while the sum is 22.

The square root of 99000040 is about 9949.8763811416. The cubic root of 99000040 is about 462.6065632222.

The spelling of 99000040 in words is "ninety-nine million, forty", and thus it is an aban number and an uban number.