38815457 has 2 divisors, whose sum is σ = 38815458. Its totient is φ = 38815456.

The previous prime is 38815453. The next prime is 38815477. The reversal of 38815457 is 75451883.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 32307856 + 6507601 = 5684^2 + 2551^2 .

It is a cyclic number.

It is not a de Polignac number, because 38815457 - 2² = 38815453 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (38815453) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19407728 + 19407729.

It is an arithmetic number, because the mean of its divisors is an integer number (19407729).

Almost surely, 2^38815457 is an apocalyptic number.

It is an amenable number.

38815457 is a deficient number, since it is larger than the sum of its proper divisors (1).

38815457 is an equidigital number, since it uses as much as digits as its factorization.

38815457 is an evil number, because the sum of its binary digits is even.

The product of its digits is 134400, while the sum is 41.

The square root of 38815457 is about 6230.2052133136. The cubic root of 38815457 is about 338.5854058029.

The spelling of 38815457 in words is "thirty-eight million, eight hundred fifteen thousand, four hundred fifty-seven".