39905492 has 12 divisors (see below), whose sum is σ = 76183296. Its totient is φ = 18138840.

The previous prime is 39905473. The next prime is 39905501. The reversal of 39905492 is 29450993.

It is a plaindrome in base 12.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 453428 + ... + 453515.

It is an arithmetic number, because the mean of its divisors is an integer number (6348608).

Almost surely, 2^39905492 is an apocalyptic number.

It is an amenable number.

39905492 is a deficient number, since it is larger than the sum of its proper divisors (36277804).

39905492 is a wasteful number, since it uses less digits than its factorization.

39905492 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 906958 (or 906956 counting only the distinct ones).

The product of its (nonzero) digits is 87480, while the sum is 41.

The square root of 39905492 is about 6317.0793884516. The cubic root of 39905492 is about 341.7256329188.

The spelling of 39905492 in words is "thirty-nine million, nine hundred five thousand, four hundred ninety-two".