40491764 has 24 divisors (see below), whose sum is σ = 74561928. Its totient is φ = 19215360.

The previous prime is 40491757. The next prime is 40491779. The reversal of 40491764 is 46719404.

It can be written as a sum of positive squares in 4 ways, for example, as 67600 + 40424164 = 260^2 + 6358^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2732 + ... + 9404.

It is an arithmetic number, because the mean of its divisors is an integer number (3106747).

Almost surely, 2^40491764 is an apocalyptic number.

It is an amenable number.

40491764 is a deficient number, since it is larger than the sum of its proper divisors (34070164).

40491764 is a wasteful number, since it uses less digits than its factorization.

40491764 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6755 (or 6753 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 35.

The square root of 40491764 is about 6363.3139165061. The cubic root of 40491764 is about 343.3909925051.

The spelling of 40491764 in words is "forty million, four hundred ninety-one thousand, seven hundred sixty-four".