38388257 has 4 divisors (see below), whose sum is σ = 39712020. Its totient is φ = 37064496.

The previous prime is 38388239. The next prime is 38388289. The reversal of 38388257 is 75288383.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 16072081 + 22316176 = 4009^2 + 4724^2 .

It is a cyclic number.

It is not a de Polignac number, because 38388257 - 2¹⁶ = 38322721 is a prime.

It is not an unprimeable number, because it can be changed into a prime (38388157) 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, 661838 + ... + 661895.

It is an arithmetic number, because the mean of its divisors is an integer number (9928005).

Almost surely, 2^38388257 is an apocalyptic number.

It is an amenable number.

38388257 is a deficient number, since it is larger than the sum of its proper divisors (1323763).

38388257 is a wasteful number, since it uses less digits than its factorization.

38388257 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1323762.

The product of its digits is 322560, while the sum is 44.

The square root of 38388257 is about 6195.8257722438. The cubic root of 38388257 is about 337.3386722333.

The spelling of 38388257 in words is "thirty-eight million, three hundred eighty-eight thousand, two hundred fifty-seven".