40138790 has 16 divisors (see below), whose sum is σ = 72453312. Its totient is φ = 16010304.

The previous prime is 40138771. The next prime is 40138801. The reversal of 40138790 is 9783104.

It is a super-2 number, since 2×40138790² = 3222244925328200, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1799 + ... + 9138.

It is an arithmetic number, because the mean of its divisors is an integer number (4528332).

Almost surely, 2^40138790 is an apocalyptic number.

40138790 is a deficient number, since it is larger than the sum of its proper divisors (32314522).

40138790 is a wasteful number, since it uses less digits than its factorization.

40138790 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11311.

The product of its (nonzero) digits is 6048, while the sum is 32.

The square root of 40138790 is about 6335.5181319289. The cubic root of 40138790 is about 342.3902786694.

The spelling of 40138790 in words is "forty million, one hundred thirty-eight thousand, seven hundred ninety".