40931668 has 6 divisors (see below), whose sum is σ = 71630426. Its totient is φ = 20465832.

The previous prime is 40931647. The next prime is 40931669. The reversal of 40931668 is 86613904.

It can be written as a sum of positive squares in only one way, i.e., 39087504 + 1844164 = 6252^2 + 1358^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40931669) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5116455 + ... + 5116462.

Almost surely, 2^40931668 is an apocalyptic number.

It is an amenable number.

40931668 is a deficient number, since it is larger than the sum of its proper divisors (30698758).

40931668 is a wasteful number, since it uses less digits than its factorization.

40931668 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10232921 (or 10232919 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 37.

The square root of 40931668 is about 6397.7861796093. The cubic root of 40931668 is about 344.6300536308.

The spelling of 40931668 in words is "forty million, nine hundred thirty-one thousand, six hundred sixty-eight".