40204138 has 16 divisors (see below), whose sum is σ = 67769856. Its totient is φ = 17748720.

The previous prime is 40204123. The next prime is 40204139. The reversal of 40204138 is 83140204.

It is not an unprimeable number, because it can be changed into a prime (40204139) 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, 33018 + ... + 34213.

It is an arithmetic number, because the mean of its divisors is an integer number (4235616).

Almost surely, 2^40204138 is an apocalyptic number.

40204138 is a deficient number, since it is larger than the sum of its proper divisors (27565718).

40204138 is a wasteful number, since it uses less digits than its factorization.

40204138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67269.

The product of its (nonzero) digits is 768, while the sum is 22.

The square root of 40204138 is about 6340.6733080959. The cubic root of 40204138 is about 342.5759875445.

The spelling of 40204138 in words is "forty million, two hundred four thousand, one hundred thirty-eight".