40820660 has 12 divisors (see below), whose sum is σ = 85723428. Its totient is φ = 16328256.

The previous prime is 40820639. The next prime is 40820687. The reversal of 40820660 is 6602804.

It can be written as a sum of positive squares in 2 ways, for example, as 31651876 + 9168784 = 5626^2 + 3028^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1020497 + ... + 1020536.

It is an arithmetic number, because the mean of its divisors is an integer number (7143619).

Almost surely, 2^40820660 is an apocalyptic number.

It is an amenable number.

40820660 is an abundant number, since it is smaller than the sum of its proper divisors (44902768).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

40820660 is a wasteful number, since it uses less digits than its factorization.

40820660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2041042 (or 2041040 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 26.

The square root of 40820660 is about 6389.1047886226. The cubic root of 40820660 is about 344.3182222988.

The spelling of 40820660 in words is "forty million, eight hundred twenty thousand, six hundred sixty".