40818779 has 4 divisors (see below), whose sum is σ = 40848000. Its totient is φ = 40789560.

The previous prime is 40818761. The next prime is 40818803. The reversal of 40818779 is 97781804.

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 40818779 - 2⁸ = 40818523 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40818719) 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, 12404 + ... + 15345.

It is an arithmetic number, because the mean of its divisors is an integer number (10212000).

Almost surely, 2^40818779 is an apocalyptic number.

40818779 is a deficient number, since it is larger than the sum of its proper divisors (29221).

40818779 is a wasteful number, since it uses less digits than its factorization.

40818779 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29220.

The product of its (nonzero) digits is 112896, while the sum is 44.

The square root of 40818779 is about 6388.9575832056. The cubic root of 40818779 is about 344.3129335347.

The spelling of 40818779 in words is "forty million, eight hundred eighteen thousand, seven hundred seventy-nine".