285378388 has 24 divisors (see below), whose sum is σ = 551783232. Its totient is φ = 128456064.

The previous prime is 285378383. The next prime is 285378397. The reversal of 285378388 is 883873582.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (285378383) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 89670 + ... + 92797.

It is an arithmetic number, because the mean of its divisors is an integer number (22990968).

Almost surely, 2^285378388 is an apocalyptic number.

It is an amenable number.

285378388 is a deficient number, since it is larger than the sum of its proper divisors (266404844).

285378388 is a wasteful number, since it uses less digits than its factorization.

285378388 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 182511 (or 182509 counting only the distinct ones).

The product of its digits is 2580480, while the sum is 52.

The square root of 285378388 is about 16893.1461841778. The cubic root of 285378388 is about 658.3755489602.

The spelling of 285378388 in words is "two hundred eighty-five million, three hundred seventy-eight thousand, three hundred eighty-eight".