39994418 has 4 divisors (see below), whose sum is σ = 59991630. Its totient is φ = 19997208.

The previous prime is 39994397. The next prime is 39994439. The reversal of 39994418 is 81449993.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 81449993 = 71 ⋅1147183.

It is an interprime number because it is at equal distance from previous prime (39994397) and next prime (39994439).

It can be written as a sum of positive squares in only one way, i.e., 29735209 + 10259209 = 5453^2 + 3203^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9998603 + ... + 9998606.

Almost surely, 2^39994418 is an apocalyptic number.

39994418 is a deficient number, since it is larger than the sum of its proper divisors (19997212).

39994418 is a wasteful number, since it uses less digits than its factorization.

39994418 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19997211.

The product of its digits is 279936, while the sum is 47.

The square root of 39994418 is about 6324.1140090925. The cubic root of 39994418 is about 341.9792801190.

The spelling of 39994418 in words is "thirty-nine million, nine hundred ninety-four thousand, four hundred eighteen".