39957436 has 12 divisors (see below), whose sum is σ = 70000560. Its totient is φ = 19957280.

The previous prime is 39957431. The next prime is 39957439. The reversal of 39957436 is 63475993.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (39957431) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 721 + ... + 8968.

It is an arithmetic number, because the mean of its divisors is an integer number (5833380).

Almost surely, 2^39957436 is an apocalyptic number.

It is an amenable number.

39957436 is a deficient number, since it is larger than the sum of its proper divisors (30043124).

39957436 is a wasteful number, since it uses less digits than its factorization.

39957436 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10724 (or 10722 counting only the distinct ones).

The product of its digits is 612360, while the sum is 46.

The square root of 39957436 is about 6321.1894450333. The cubic root of 39957436 is about 341.8738405891.

The spelling of 39957436 in words is "thirty-nine million, nine hundred fifty-seven thousand, four hundred thirty-six".