39957542 has 4 divisors (see below), whose sum is σ = 59936316. Its totient is φ = 19978770.

The previous prime is 39957487. The next prime is 39957553. The reversal of 39957542 is 24575993.

It is a semiprime because it is the product of two primes.

It is a junction number, because it is equal to n+sod(n) for n = 39957493 and 39957502.

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 as a sum of consecutive naturals, namely, 9989384 + ... + 9989387.

It is an arithmetic number, because the mean of its divisors is an integer number (14984079).

Almost surely, 2^39957542 is an apocalyptic number.

39957542 is a deficient number, since it is larger than the sum of its proper divisors (19978774).

39957542 is a wasteful number, since it uses less digits than its factorization.

39957542 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19978773.

The product of its digits is 340200, while the sum is 44.

The square root of 39957542 is about 6321.1978295257. The cubic root of 39957542 is about 341.8741428991.

The spelling of 39957542 in words is "thirty-nine million, nine hundred fifty-seven thousand, five hundred forty-two".