39642874 has 4 divisors (see below), whose sum is σ = 59464314. Its totient is φ = 19821436.

The previous prime is 39642871. The next prime is 39642881. The reversal of 39642874 is 47824693.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 47824693 = 7 ⋅6832099.

It can be written as a sum of positive squares in only one way, i.e., 31192225 + 8450649 = 5585^2 + 2907^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 39642874.

It is not an unprimeable number, because it can be changed into a prime (39642871) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9910717 + ... + 9910720.

Almost surely, 2^39642874 is an apocalyptic number.

39642874 is a deficient number, since it is larger than the sum of its proper divisors (19821440).

39642874 is a wasteful number, since it uses less digits than its factorization.

39642874 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19821439.

The product of its digits is 290304, while the sum is 43.

The square root of 39642874 is about 6296.2587303890. The cubic root of 39642874 is about 340.9743504298.

The spelling of 39642874 in words is "thirty-nine million, six hundred forty-two thousand, eight hundred seventy-four".