39861394 has 4 divisors (see below), whose sum is σ = 59792094. Its totient is φ = 19930696.

The previous prime is 39861361. The next prime is 39861401. The reversal of 39861394 is 49316893.

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

It can be written as a sum of positive squares in only one way, i.e., 36300625 + 3560769 = 6025^2 + 1887^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 39861394.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9965347 + ... + 9965350.

Almost surely, 2^39861394 is an apocalyptic number.

39861394 is a deficient number, since it is larger than the sum of its proper divisors (19930700).

39861394 is a wasteful number, since it uses less digits than its factorization.

39861394 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19930699.

The product of its digits is 139968, while the sum is 43.

The square root of 39861394 is about 6313.5880448442. The cubic root of 39861394 is about 341.5997106419.

The spelling of 39861394 in words is "thirty-nine million, eight hundred sixty-one thousand, three hundred ninety-four".