40904779 has 4 divisors (see below), whose sum is σ = 42224320. Its totient is φ = 39585240.

The previous prime is 40904753. The next prime is 40904791. The reversal of 40904779 is 97740904.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 40904779 - 2⁷ = 40904651 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40904749) 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, 659724 + ... + 659785.

It is an arithmetic number, because the mean of its divisors is an integer number (10556080).

Almost surely, 2^40904779 is an apocalyptic number.

40904779 is a deficient number, since it is larger than the sum of its proper divisors (1319541).

40904779 is a wasteful number, since it uses less digits than its factorization.

40904779 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1319540.

The product of its (nonzero) digits is 63504, while the sum is 40.

The square root of 40904779 is about 6395.6844043464. The cubic root of 40904779 is about 344.5545718348.

The spelling of 40904779 in words is "forty million, nine hundred four thousand, seven hundred seventy-nine".