40904073 has 18 divisors (see below), whose sum is σ = 68730714. Its totient is φ = 23373504.

The previous prime is 40904041. The next prime is 40904089. The reversal of 40904073 is 37040904.

It can be written as a sum of positive squares in only one way, i.e., 32626944 + 8277129 = 5712^2 + 2877^2 .

It is not a de Polignac number, because 40904073 - 2⁵ = 40904041 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40904173) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 45936 + ... + 46817.

It is an arithmetic number, because the mean of its divisors is an integer number (3818373).

Almost surely, 2^40904073 is an apocalyptic number.

It is an amenable number.

40904073 is a deficient number, since it is larger than the sum of its proper divisors (27826641).

40904073 is a wasteful number, since it uses less digits than its factorization.

40904073 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 92773 (or 92763 counting only the distinct ones).

The product of its (nonzero) digits is 3024, while the sum is 27.

The square root of 40904073 is about 6395.6292106407. The cubic root of 40904073 is about 344.5525895324.

Adding to 40904073 its reverse (37040904), we get a palindrome (77944977).

The spelling of 40904073 in words is "forty million, nine hundred four thousand, seventy-three".