38478257 has 2 divisors, whose sum is σ = 38478258. Its totient is φ = 38478256.

The previous prime is 38478239. The next prime is 38478277. The reversal of 38478257 is 75287483.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 28718881 + 9759376 = 5359^2 + 3124^2 .

It is an emirp because it is prime and its reverse (75287483) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 38478257 - 2⁸ = 38478001 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (38478277) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19239128 + 19239129.

It is an arithmetic number, because the mean of its divisors is an integer number (19239129).

Almost surely, 2^38478257 is an apocalyptic number.

It is an amenable number.

38478257 is a deficient number, since it is larger than the sum of its proper divisors (1).

38478257 is an equidigital number, since it uses as much as digits as its factorization.

38478257 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 376320, while the sum is 44.

The square root of 38478257 is about 6203.0844746787. The cubic root of 38478257 is about 337.6020929366.

The spelling of 38478257 in words is "thirty-eight million, four hundred seventy-eight thousand, two hundred fifty-seven".