39973018 has 8 divisors (see below), whose sum is σ = 63486612. Its totient is φ = 18810816.

The previous prime is 39973013. The next prime is 39973033. The reversal of 39973018 is 81037993.

It can be written as a sum of positive squares in 2 ways, for example, as 33837489 + 6135529 = 5817^2 + 2477^2 .

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

It is not an unprimeable number, because it can be changed into a prime (39973013) 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, 587805 + ... + 587872.

Almost surely, 2^39973018 is an apocalyptic number.

39973018 is a deficient number, since it is larger than the sum of its proper divisors (23513594).

39973018 is a wasteful number, since it uses less digits than its factorization.

39973018 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1175696.

The product of its (nonzero) digits is 40824, while the sum is 40.

The square root of 39973018 is about 6322.4218460966. The cubic root of 39973018 is about 341.9182744201.

The spelling of 39973018 in words is "thirty-nine million, nine hundred seventy-three thousand, eighteen".