40139694 has 24 divisors (see below), whose sum is σ = 99393840. Its totient is φ = 11468448.

The previous prime is 40139689. The next prime is 40139711. The reversal of 40139694 is 49693104.

It is a super-2 number, since 2×40139694² = 3222390068827272, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 159159 + ... + 159410.

It is an arithmetic number, because the mean of its divisors is an integer number (4141410).

Almost surely, 2^40139694 is an apocalyptic number.

40139694 is an abundant number, since it is smaller than the sum of its proper divisors (59254146).

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

40139694 is a wasteful number, since it uses less digits than its factorization.

40139694 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 318584 (or 318581 counting only the distinct ones).

The product of its (nonzero) digits is 23328, while the sum is 36.

The square root of 40139694 is about 6335.5894753369. The cubic root of 40139694 is about 342.3928490715.

The spelling of 40139694 in words is "forty million, one hundred thirty-nine thousand, six hundred ninety-four".