39912394 has 4 divisors (see below), whose sum is σ = 59868594. Its totient is φ = 19956196.

The previous prime is 39912359. The next prime is 39912401. The reversal of 39912394 is 49321993.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 49321993 = 7 ⋅7045999.

It can be written as a sum of positive squares in only one way, i.e., 38601369 + 1311025 = 6213^2 + 1145^2 .

It is a super-2 number, since 2×39912394² = 3185998389622472, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9978097 + ... + 9978100.

Almost surely, 2^39912394 is an apocalyptic number.

39912394 is a deficient number, since it is larger than the sum of its proper divisors (19956200).

39912394 is a wasteful number, since it uses less digits than its factorization.

39912394 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19956199.

The product of its digits is 52488, while the sum is 40.

The square root of 39912394 is about 6317.6256615915. The cubic root of 39912394 is about 341.7453332511.

The spelling of 39912394 in words is "thirty-nine million, nine hundred twelve thousand, three hundred ninety-four".