385991284 has 12 divisors (see below), whose sum is σ = 771982624. Its totient is φ = 165424824.

The previous prime is 385991269. The next prime is 385991293. The reversal of 385991284 is 482199583.

385991284 is an admirable number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6892674 + ... + 6892729.

Almost surely, 2^385991284 is an apocalyptic number.

It is an amenable number.

385991284 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

385991284 is a wasteful number, since it uses less digits than its factorization.

385991284 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13785414 (or 13785412 counting only the distinct ones).

The product of its digits is 622080, while the sum is 49.

The square root of 385991284 is about 19646.6608867767. The cubic root of 385991284 is about 728.1024616281.

The spelling of 385991284 in words is "three hundred eighty-five million, nine hundred ninety-one thousand, two hundred eighty-four".