39520004 has 6 divisors (see below), whose sum is σ = 69160014. Its totient is φ = 19760000.

The previous prime is 39519983. The next prime is 39520043. The reversal of 39520004 is 40002593.

It can be written as a sum of positive squares in only one way, i.e., 36966400 + 2553604 = 6080^2 + 1598^2 .

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, 4939997 + ... + 4940004.

It is an arithmetic number, because the mean of its divisors is an integer number (11526669).

Almost surely, 2^39520004 is an apocalyptic number.

It is an amenable number.

39520004 is a deficient number, since it is larger than the sum of its proper divisors (29640010).

39520004 is a wasteful number, since it uses less digits than its factorization.

39520004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9880005 (or 9880003 counting only the distinct ones).

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

The square root of 39520004 is about 6286.4937763431. The cubic root of 39520004 is about 340.6217113730.

Adding to 39520004 its reverse (40002593), we get a palindrome (79522597).

The spelling of 39520004 in words is "thirty-nine million, five hundred twenty thousand, four".