390172036 has 6 divisors (see below), whose sum is σ = 682801070. Its totient is φ = 195086016.

The previous prime is 390172033. The next prime is 390172037. The reversal of 390172036 is 630271093.

It can be written as a sum of positive squares in only one way, i.e., 387302400 + 2869636 = 19680^2 + 1694^2 .

It is a junction number, because it is equal to n+sod(n) for n = 390171989 and 390172007.

It is not an unprimeable number, because it can be changed into a prime (390172033) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 48771501 + ... + 48771508.

Almost surely, 2^390172036 is an apocalyptic number.

It is an amenable number.

390172036 is a deficient number, since it is larger than the sum of its proper divisors (292629034).

390172036 is a wasteful number, since it uses less digits than its factorization.

390172036 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 97543013 (or 97543011 counting only the distinct ones).

The product of its (nonzero) digits is 6804, while the sum is 31.

The square root of 390172036 is about 19752.7728686380. The cubic root of 390172036 is about 730.7217706494.

The spelling of 390172036 in words is "three hundred ninety million, one hundred seventy-two thousand, thirty-six".