39040025 has 6 divisors (see below), whose sum is σ = 48409662. Its totient is φ = 31232000.

The previous prime is 39040021. The next prime is 39040037. The reversal of 39040025 is 52004093.

It can be written as a sum of positive squares in 3 ways, for example, as 12866569 + 26173456 = 3587^2 + 5116^2 .

It is not a de Polignac number, because 39040025 - 2² = 39040021 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (39040021) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 780776 + ... + 780825.

It is an arithmetic number, because the mean of its divisors is an integer number (8068277).

Almost surely, 2^39040025 is an apocalyptic number.

It is an amenable number.

39040025 is a deficient number, since it is larger than the sum of its proper divisors (9369637).

39040025 is a wasteful number, since it uses less digits than its factorization.

39040025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1561611 (or 1561606 counting only the distinct ones).

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

The square root of 39040025 is about 6248.2017413013. The cubic root of 39040025 is about 339.2371159518.

The spelling of 39040025 in words is "thirty-nine million, forty thousand, twenty-five".