40904881 has 4 divisors (see below), whose sum is σ = 41217264. Its totient is φ = 40592500.

The previous prime is 40904861. The next prime is 40904909. The reversal of 40904881 is 18840904.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 40904881 - 2⁵ = 40904849 is a prime.

It is a super-2 number, since 2×40904881² = 3346418579248322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40904861) 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, 155995 + ... + 156256.

It is an arithmetic number, because the mean of its divisors is an integer number (10304316).

Almost surely, 2^40904881 is an apocalyptic number.

It is an amenable number.

40904881 is a deficient number, since it is larger than the sum of its proper divisors (312383).

40904881 is a wasteful number, since it uses less digits than its factorization.

40904881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 312382.

The product of its (nonzero) digits is 9216, while the sum is 34.

The square root of 40904881 is about 6395.6923784685. The cubic root of 40904881 is about 344.5548582279.

The spelling of 40904881 in words is "forty million, nine hundred four thousand, eight hundred eighty-one".