40642556 has 12 divisors (see below), whose sum is σ = 71596560. Its totient is φ = 20186400.

The previous prime is 40642549. The next prime is 40642571. The reversal of 40642556 is 65524604.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 33041 + ... + 34248.

It is an arithmetic number, because the mean of its divisors is an integer number (5966380).

Almost surely, 2^40642556 is an apocalyptic number.

It is an amenable number.

40642556 is a deficient number, since it is larger than the sum of its proper divisors (30954004).

40642556 is a wasteful number, since it uses less digits than its factorization.

40642556 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67444 (or 67442 counting only the distinct ones).

The product of its (nonzero) digits is 28800, while the sum is 32.

The square root of 40642556 is about 6375.1514491814. The cubic root of 40642556 is about 343.8167290402.

The spelling of 40642556 in words is "forty million, six hundred forty-two thousand, five hundred fifty-six".