40801779 has 16 divisors (see below), whose sum is σ = 60547200. Its totient is φ = 27156168.

The previous prime is 40801771. The next prime is 40801867. The reversal of 40801779 is 97710804.

It is not a de Polignac number, because 40801779 - 2³ = 40801771 is a prime.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (40801771) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 26772 + ... + 28254.

It is an arithmetic number, because the mean of its divisors is an integer number (3784200).

Almost surely, 2^40801779 is an apocalyptic number.

40801779 is a deficient number, since it is larger than the sum of its proper divisors (19745421).

40801779 is a wasteful number, since it uses less digits than its factorization.

40801779 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2511 (or 2505 counting only the distinct ones).

The product of its (nonzero) digits is 14112, while the sum is 36.

The square root of 40801779 is about 6387.6270241773. The cubic root of 40801779 is about 344.2651276572.

The spelling of 40801779 in words is "forty million, eight hundred one thousand, seven hundred seventy-nine".