38624257 has 4 divisors (see below), whose sum is σ = 44142016. Its totient is φ = 33106500.

The previous prime is 38624251. The next prime is 38624281. The reversal of 38624257 is 75242683.

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.

It is not a de Polignac number, because 38624257 - 2³ = 38624249 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (38624251) 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, 2758869 + ... + 2758882.

It is an arithmetic number, because the mean of its divisors is an integer number (11035504).

Almost surely, 2^38624257 is an apocalyptic number.

It is an amenable number.

38624257 is a deficient number, since it is larger than the sum of its proper divisors (5517759).

38624257 is an equidigital number, since it uses as much as digits as its factorization.

38624257 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5517758.

The product of its digits is 80640, while the sum is 37.

The square root of 38624257 is about 6214.8416713541. The cubic root of 38624257 is about 338.0285475929.

The spelling of 38624257 in words is "thirty-eight million, six hundred twenty-four thousand, two hundred fifty-seven".