385257216 has 36 divisors (see below), whose sum is σ = 1025348072. Its totient is φ = 128418816.

The previous prime is 385257211. The next prime is 385257221. The reversal of 385257216 is 612752583.

It is an interprime number because it is at equal distance from previous prime (385257211) and next prime (385257221).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (385257211) 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, 250051 + ... + 251586.

Almost surely, 2^385257216 is an apocalyptic number.

It is an amenable number.

385257216 is an abundant number, since it is smaller than the sum of its proper divisors (640090856).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

385257216 is an equidigital number, since it uses as much as digits as its factorization.

385257216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 501656 (or 501642 counting only the distinct ones).

The product of its digits is 100800, while the sum is 39.

The square root of 385257216 is about 19627.9702465640. The cubic root of 385257216 is about 727.6406067311.

The spelling of 385257216 in words is "three hundred eighty-five million, two hundred fifty-seven thousand, two hundred sixteen".