38628857 has 2 divisors, whose sum is σ = 38628858. Its totient is φ = 38628856.

The previous prime is 38628829. The next prime is 38628901. The reversal of 38628857 is 75882683.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 25240576 + 13388281 = 5024^2 + 3659^2 .

It is an emirp because it is prime and its reverse (75882683) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 38628857 - 2¹⁶ = 38563321 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (38621857) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19314428 + 19314429.

It is an arithmetic number, because the mean of its divisors is an integer number (19314429).

Almost surely, 2^38628857 is an apocalyptic number.

It is an amenable number.

38628857 is a deficient number, since it is larger than the sum of its proper divisors (1).

38628857 is an equidigital number, since it uses as much as digits as its factorization.

38628857 is an evil number, because the sum of its binary digits is even.

The product of its digits is 645120, while the sum is 47.

The square root of 38628857 is about 6215.2117421694. The cubic root of 38628857 is about 338.0419663588.

The spelling of 38628857 in words is "thirty-eight million, six hundred twenty-eight thousand, eight hundred fifty-seven".