390572257 has 2 divisors, whose sum is σ = 390572258. Its totient is φ = 390572256.

The previous prime is 390572251. The next prime is 390572291. The reversal of 390572257 is 752275093.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 217149696 + 173422561 = 14736^2 + 13169^2 .

It is a cyclic number.

It is not a de Polignac number, because 390572257 - 2³ = 390572249 is a prime.

It is not a weakly prime, because it can be changed into another prime (390572251) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 195286128 + 195286129.

It is an arithmetic number, because the mean of its divisors is an integer number (195286129).

Almost surely, 2^390572257 is an apocalyptic number.

It is an amenable number.

390572257 is a deficient number, since it is larger than the sum of its proper divisors (1).

390572257 is an equidigital number, since it uses as much as digits as its factorization.

390572257 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 132300, while the sum is 40.

The square root of 390572257 is about 19762.9010269242. The cubic root of 390572257 is about 730.9715324926.

It can be divided in two parts, 39057 and 2257, that added together give a palindrome (41314).

The spelling of 390572257 in words is "three hundred ninety million, five hundred seventy-two thousand, two hundred fifty-seven".