40913638 has 8 divisors (see below), whose sum is σ = 63029232. Its totient is φ = 19903896.

The previous prime is 40913633. The next prime is 40913647. The reversal of 40913638 is 83631904.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40913633) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 276370 + ... + 276517.

It is an arithmetic number, because the mean of its divisors is an integer number (7878654).

Almost surely, 2^40913638 is an apocalyptic number.

40913638 is a deficient number, since it is larger than the sum of its proper divisors (22115594).

40913638 is a wasteful number, since it uses less digits than its factorization.

40913638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 552926.

The product of its (nonzero) digits is 15552, while the sum is 34.

The square root of 40913638 is about 6396.3769432390. The cubic root of 40913638 is about 344.5794441414.

The spelling of 40913638 in words is "forty million, nine hundred thirteen thousand, six hundred thirty-eight".