39869090 has 16 divisors (see below), whose sum is σ = 71996472. Its totient is φ = 15896064.

The previous prime is 39869059. The next prime is 39869099. The reversal of 39869090 is 9096893.

It can be written as a sum of positive squares in 4 ways, for example, as 31125241 + 8743849 = 5579^2 + 2957^2 .

It is not an unprimeable number, because it can be changed into a prime (39869099) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3119 + ... + 9458.

Almost surely, 2^39869090 is an apocalyptic number.

39869090 is a deficient number, since it is larger than the sum of its proper divisors (32127382).

39869090 is a wasteful number, since it uses less digits than its factorization.

39869090 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12901.

The product of its (nonzero) digits is 104976, while the sum is 44.

The square root of 39869090 is about 6314.1974945356. The cubic root of 39869090 is about 341.6216933335.

The spelling of 39869090 in words is "thirty-nine million, eight hundred sixty-nine thousand, ninety".