39500042 has 4 divisors (see below), whose sum is σ = 59250066. Its totient is φ = 19750020.

The previous prime is 39500029. The next prime is 39500057. The reversal of 39500042 is 24000593.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 38576521 + 923521 = 6211^2 + 961^2 .

It is a junction number, because it is equal to n+sod(n) for n = 39499990 and 39500017.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9875009 + ... + 9875012.

Almost surely, 2^39500042 is an apocalyptic number.

39500042 is a deficient number, since it is larger than the sum of its proper divisors (19750024).

39500042 is a wasteful number, since it uses less digits than its factorization.

39500042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19750023.

The product of its (nonzero) digits is 1080, while the sum is 23.

The square root of 39500042 is about 6284.9058863280. The cubic root of 39500042 is about 340.5643510907.

The spelling of 39500042 in words is "thirty-nine million, five hundred thousand, forty-two".