38928251 has 2 divisors, whose sum is σ = 38928252. Its totient is φ = 38928250.

The previous prime is 38928247. The next prime is 38928257. The reversal of 38928251 is 15282983.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 38928251 - 2² = 38928247 is a prime.

It is not a weakly prime, because it can be changed into another prime (38928257) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19464125 + 19464126.

It is an arithmetic number, because the mean of its divisors is an integer number (19464126).

Almost surely, 2^38928251 is an apocalyptic number.

38928251 is a deficient number, since it is larger than the sum of its proper divisors (1).

38928251 is an equidigital number, since it uses as much as digits as its factorization.

38928251 is an evil number, because the sum of its binary digits is even.

The product of its digits is 34560, while the sum is 38.

The square root of 38928251 is about 6239.2508364386. The cubic root of 38928251 is about 338.9130542215.

The spelling of 38928251 in words is "thirty-eight million, nine hundred twenty-eight thousand, two hundred fifty-one".