39921374 has 4 divisors (see below), whose sum is σ = 59882064. Its totient is φ = 19960686.

The previous prime is 39921319. The next prime is 39921391. The reversal of 39921374 is 47312993.

39921374 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a super-2 number, since 2×39921374² = 3187432204095752, which contains 22 as substring.

It is a congruent number.

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 as a sum of consecutive naturals, namely, 9980342 + ... + 9980345.

It is an arithmetic number, because the mean of its divisors is an integer number (14970516).

Almost surely, 2^39921374 is an apocalyptic number.

39921374 is a deficient number, since it is larger than the sum of its proper divisors (19960690).

39921374 is a wasteful number, since it uses less digits than its factorization.

39921374 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19960689.

The product of its digits is 40824, while the sum is 38.

The square root of 39921374 is about 6318.3363316620. The cubic root of 39921374 is about 341.7709614053.

The spelling of 39921374 in words is "thirty-nine million, nine hundred twenty-one thousand, three hundred seventy-four".