39864946 has 16 divisors (see below), whose sum is σ = 67339008. Its totient is φ = 17535600.

The previous prime is 39864941. The next prime is 39864959. The reversal of 39864946 is 64946893.

It is a self number, because there is not a number n which added to its sum of digits gives 39864946.

It is not an unprimeable number, because it can be changed into a prime (39864941) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 28545 + ... + 29908.

It is an arithmetic number, because the mean of its divisors is an integer number (4208688).

Almost surely, 2^39864946 is an apocalyptic number.

39864946 is a deficient number, since it is larger than the sum of its proper divisors (27474062).

39864946 is a wasteful number, since it uses less digits than its factorization.

39864946 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58497.

The product of its digits is 1119744, while the sum is 49.

The square root of 39864946 is about 6313.8693366271. The cubic root of 39864946 is about 341.6098568511.

The spelling of 39864946 in words is "thirty-nine million, eight hundred sixty-four thousand, nine hundred forty-six".