40366642 has 4 divisors (see below), whose sum is σ = 60549966. Its totient is φ = 20183320.

The previous prime is 40366607. The next prime is 40366643. The reversal of 40366642 is 24666304.

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., 35748441 + 4618201 = 5979^2 + 2149^2 .

It is not an unprimeable number, because it can be changed into a prime (40366643) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10091659 + ... + 10091662.

Almost surely, 2^40366642 is an apocalyptic number.

40366642 is a deficient number, since it is larger than the sum of its proper divisors (20183324).

40366642 is a wasteful number, since it uses less digits than its factorization.

40366642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20183323.

The product of its (nonzero) digits is 20736, while the sum is 31.

The square root of 40366642 is about 6353.4747973058. The cubic root of 40366642 is about 343.0369279148.

The spelling of 40366642 in words is "forty million, three hundred sixty-six thousand, six hundred forty-two".