39128422 has 4 divisors (see below), whose sum is σ = 58692636. Its totient is φ = 19564210.

The previous prime is 39128381. The next prime is 39128431. The reversal of 39128422 is 22482193.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 22482193 = 983 ⋅22871.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9782104 + ... + 9782107.

It is an arithmetic number, because the mean of its divisors is an integer number (14673159).

Almost surely, 2^39128422 is an apocalyptic number.

39128422 is a deficient number, since it is larger than the sum of its proper divisors (19564214).

39128422 is a wasteful number, since it uses less digits than its factorization.

39128422 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19564213.

The product of its digits is 6912, while the sum is 31.

The square root of 39128422 is about 6255.2715368719. The cubic root of 39128422 is about 339.4929639651.

The spelling of 39128422 in words is "thirty-nine million, one hundred twenty-eight thousand, four hundred twenty-two".