39406540 has 12 divisors (see below), whose sum is σ = 82753776. Its totient is φ = 15762608.

The previous prime is 39406537. The next prime is 39406573. The reversal of 39406540 is 4560493.

39406540 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 985144 + ... + 985183.

It is an arithmetic number, because the mean of its divisors is an integer number (6896148).

Almost surely, 2^39406540 is an apocalyptic number.

It is an amenable number.

39406540 is an abundant number, since it is smaller than the sum of its proper divisors (43347236).

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

39406540 is a wasteful number, since it uses less digits than its factorization.

39406540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1970336 (or 1970334 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 31.

The square root of 39406540 is about 6277.4628632912. The cubic root of 39406540 is about 340.2954179844.

The spelling of 39406540 in words is "thirty-nine million, four hundred six thousand, five hundred forty".