39280042 has 4 divisors (see below), whose sum is σ = 58920066. Its totient is φ = 19640020.

The previous prime is 39280001. The next prime is 39280057. The reversal of 39280042 is 24008293.

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., 36108081 + 3171961 = 6009^2 + 1781^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9820009 + ... + 9820012.

Almost surely, 2^39280042 is an apocalyptic number.

39280042 is a deficient number, since it is larger than the sum of its proper divisors (19640024).

39280042 is a wasteful number, since it uses less digits than its factorization.

39280042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19640023.

The product of its (nonzero) digits is 3456, while the sum is 28.

The square root of 39280042 is about 6267.3791970807. The cubic root of 39280042 is about 339.9309029136.

The spelling of 39280042 in words is "thirty-nine million, two hundred eighty thousand, forty-two".