38209257 has 6 divisors (see below), whose sum is σ = 55191162. Its totient is φ = 25472832.

The previous prime is 38209231. The next prime is 38209277. The reversal of 38209257 is 75290283.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 30206016 + 8003241 = 5496^2 + 2829^2 .

It is not a de Polignac number, because 38209257 - 2¹² = 38205161 is a prime.

It is not an unprimeable number, because it can be changed into a prime (38209277) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2122728 + ... + 2122745.

It is an arithmetic number, because the mean of its divisors is an integer number (9198527).

Almost surely, 2^38209257 is an apocalyptic number.

It is an amenable number.

38209257 is a deficient number, since it is larger than the sum of its proper divisors (16981905).

38209257 is a wasteful number, since it uses less digits than its factorization.

38209257 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4245479 (or 4245476 counting only the distinct ones).

The product of its (nonzero) digits is 30240, while the sum is 36.

The square root of 38209257 is about 6181.3636844955. The cubic root of 38209257 is about 336.8135314316.

The spelling of 38209257 in words is "thirty-eight million, two hundred nine thousand, two hundred fifty-seven".