40138611 has 16 divisors (see below), whose sum is σ = 57037824. Its totient is φ = 25049024.

The previous prime is 40138607. The next prime is 40138661. The reversal of 40138611 is 11683104.

It is not a de Polignac number, because 40138611 - 2² = 40138607 is a prime.

It is a super-2 number, since 2×40138611² = 3222216186018642, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (40138601) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2946 + ... + 9431.

It is an arithmetic number, because the mean of its divisors is an integer number (3564864).

Almost surely, 2^40138611 is an apocalyptic number.

40138611 is a deficient number, since it is larger than the sum of its proper divisors (16899213).

40138611 is a wasteful number, since it uses less digits than its factorization.

40138611 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12450.

The product of its (nonzero) digits is 576, while the sum is 24.

The square root of 40138611 is about 6335.5040052075. The cubic root of 40138611 is about 342.3897697025.

The spelling of 40138611 in words is "forty million, one hundred thirty-eight thousand, six hundred eleven".