385771257 has 12 divisors (see below), whose sum is σ = 557521380. Its totient is φ = 257044128.

The previous prime is 385771241. The next prime is 385771261. The reversal of 385771257 is 752177583.

It can be written as a sum of positive squares in 2 ways, for example, as 28901376 + 356869881 = 5376^2 + 18891^2 .

It is not a de Polignac number, because 385771257 - 2⁴ = 385771241 is a prime.

It is not an unprimeable number, because it can be changed into a prime (385771207) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 8263 + ... + 28979.

It is an arithmetic number, because the mean of its divisors is an integer number (46460115).

Almost surely, 2^385771257 is an apocalyptic number.

It is an amenable number.

385771257 is a deficient number, since it is larger than the sum of its proper divisors (171750123).

385771257 is a wasteful number, since it uses less digits than its factorization.

385771257 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22792 (or 22789 counting only the distinct ones).

The product of its digits is 411600, while the sum is 45.

The square root of 385771257 is about 19641.0604856255. The cubic root of 385771257 is about 727.9640883394.

The spelling of 385771257 in words is "three hundred eighty-five million, seven hundred seventy-one thousand, two hundred fifty-seven".