39680042 has 4 divisors (see below), whose sum is σ = 59520066. Its totient is φ = 19840020.

The previous prime is 39680009. The next prime is 39680051. The reversal of 39680042 is 24008693.

39680042 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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., 36954241 + 2725801 = 6079^2 + 1651^2 .

It is a junction number, because it is equal to n+sod(n) for n = 39679990 and 39680008.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9920009 + ... + 9920012.

Almost surely, 2^39680042 is an apocalyptic number.

39680042 is a deficient number, since it is larger than the sum of its proper divisors (19840024).

39680042 is a wasteful number, since it uses less digits than its factorization.

39680042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19840023.

The product of its (nonzero) digits is 10368, while the sum is 32.

The square root of 39680042 is about 6299.2096329619. The cubic root of 39680042 is about 341.0808796722.

The spelling of 39680042 in words is "thirty-nine million, six hundred eighty thousand, forty-two".