40712138 has 4 divisors (see below), whose sum is σ = 61068210. Its totient is φ = 20356068.

The previous prime is 40712131. The next prime is 40712159. The reversal of 40712138 is 83121704.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 29669809 + 11042329 = 5447^2 + 3323^2 .

It is not an unprimeable number, because it can be changed into a prime (40712131) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10178033 + ... + 10178036.

Almost surely, 2^40712138 is an apocalyptic number.

40712138 is a deficient number, since it is larger than the sum of its proper divisors (20356072).

40712138 is a wasteful number, since it uses less digits than its factorization.

40712138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20356071.

The product of its (nonzero) digits is 1344, while the sum is 26.

The square root of 40712138 is about 6380.6063975143. The cubic root of 40712138 is about 344.0128274016.

The spelling of 40712138 in words is "forty million, seven hundred twelve thousand, one hundred thirty-eight".