385270257 has 16 divisors (see below), whose sum is σ = 520728768. Its totient is φ = 253348800.

The previous prime is 385270253. The next prime is 385270273. The reversal of 385270257 is 752072583.

It is not a de Polignac number, because 385270257 - 2² = 385270253 is a prime.

It is not an unprimeable number, because it can be changed into a prime (385270253) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 83503 + ... + 87995.

It is an arithmetic number, because the mean of its divisors is an integer number (32545548).

Almost surely, 2^385270257 is an apocalyptic number.

It is an amenable number.

385270257 is a deficient number, since it is larger than the sum of its proper divisors (135458511).

385270257 is a wasteful number, since it uses less digits than its factorization.

385270257 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4880.

The product of its (nonzero) digits is 117600, while the sum is 39.

The square root of 385270257 is about 19628.3024482506. The cubic root of 385270257 is about 727.6488168772.

The spelling of 385270257 in words is "three hundred eighty-five million, two hundred seventy thousand, two hundred fifty-seven".