40020099 has 24 divisors (see below), whose sum is σ = 64373760. Its totient is φ = 21660912.

The previous prime is 40020089. The next prime is 40020103. The reversal of 40020099 is 99002004.

It is not a de Polignac number, because 40020099 - 2⁴ = 40020083 is a prime.

It is not an unprimeable number, because it can be changed into a prime (40020089) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4942 + ... + 10220.

It is an arithmetic number, because the mean of its divisors is an integer number (2682240).

Almost surely, 2^40020099 is an apocalyptic number.

40020099 is a deficient number, since it is larger than the sum of its proper divisors (24353661).

40020099 is a wasteful number, since it uses less digits than its factorization.

40020099 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5327 (or 5308 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 24.

The square root of 40020099 is about 6326.1440862503. The cubic root of 40020099 is about 342.0524610881.

The spelling of 40020099 in words is "forty million, twenty thousand, ninety-nine".