38345257 has 4 divisors (see below), whose sum is σ = 38830720. Its totient is φ = 37859796.

The previous prime is 38345243. The next prime is 38345267. The reversal of 38345257 is 75254383.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 75254383 = 19 ⋅3960757.

It is a cyclic number.

It is not a de Polignac number, because 38345257 - 2¹¹ = 38343209 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (38345227) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 242613 + ... + 242770.

It is an arithmetic number, because the mean of its divisors is an integer number (9707680).

Almost surely, 2^38345257 is an apocalyptic number.

It is an amenable number.

38345257 is a deficient number, since it is larger than the sum of its proper divisors (485463).

38345257 is an equidigital number, since it uses as much as digits as its factorization.

38345257 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 485462.

The product of its digits is 100800, while the sum is 37.

The square root of 38345257 is about 6192.3547217517. The cubic root of 38345257 is about 337.2126703126.

The spelling of 38345257 in words is "thirty-eight million, three hundred forty-five thousand, two hundred fifty-seven".