40615906 has 4 divisors (see below), whose sum is σ = 60923862. Its totient is φ = 20307952.

The previous prime is 40615891. The next prime is 40615933. The reversal of 40615906 is 60951604.

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., 37100281 + 3515625 = 6091^2 + 1875^2 .

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10153975 + ... + 10153978.

Almost surely, 2^40615906 is an apocalyptic number.

40615906 is a deficient number, since it is larger than the sum of its proper divisors (20307956).

40615906 is a wasteful number, since it uses less digits than its factorization.

40615906 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20307955.

The product of its (nonzero) digits is 6480, while the sum is 31.

The square root of 40615906 is about 6373.0609600097. The cubic root of 40615906 is about 343.7415638260.

The spelling of 40615906 in words is "forty million, six hundred fifteen thousand, nine hundred six".