38648657 has 2 divisors, whose sum is σ = 38648658. Its totient is φ = 38648656.

The previous prime is 38648653. The next prime is 38648669. The reversal of 38648657 is 75684683.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 24690961 + 13957696 = 4969^2 + 3736^2 .

It is a cyclic number.

It is not a de Polignac number, because 38648657 - 2² = 38648653 is a prime.

It is not a weakly prime, because it can be changed into another prime (38648651) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19324328 + 19324329.

It is an arithmetic number, because the mean of its divisors is an integer number (19324329).

Almost surely, 2^38648657 is an apocalyptic number.

It is an amenable number.

38648657 is a deficient number, since it is larger than the sum of its proper divisors (1).

38648657 is an equidigital number, since it uses as much as digits as its factorization.

38648657 is an evil number, because the sum of its binary digits is even.

The product of its digits is 967680, while the sum is 47.

The square root of 38648657 is about 6216.8044041935. The cubic root of 38648657 is about 338.0997132368.

It can be divided in two parts, 3864 and 8657, that added together give a palindrome (12521).

The spelling of 38648657 in words is "thirty-eight million, six hundred forty-eight thousand, six hundred fifty-seven".