39931930 has 8 divisors (see below), whose sum is σ = 71877492. Its totient is φ = 15972768.

The previous prime is 39931919. The next prime is 39931943. The reversal of 39931930 is 3913993.

It can be written as a sum of positive squares in 2 ways, for example, as 36759969 + 3171961 = 6063^2 + 1781^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 39931930.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1996587 + ... + 1996606.

Almost surely, 2^39931930 is an apocalyptic number.

39931930 is a deficient number, since it is larger than the sum of its proper divisors (31945562).

39931930 is a wasteful number, since it uses less digits than its factorization.

39931930 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3993200.

The product of its (nonzero) digits is 19683, while the sum is 37.

The square root of 39931930 is about 6319.1716229265. The cubic root of 39931930 is about 341.8010824154.

The spelling of 39931930 in words is "thirty-nine million, nine hundred thirty-one thousand, nine hundred thirty".