285638384 has 20 divisors (see below), whose sum is σ = 554346216. Its totient is φ = 142581312.

The previous prime is 285638363. The next prime is 285638387. The reversal of 285638384 is 483836582.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (285638387) 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, 4754 + ... + 24369.

Almost surely, 2^285638384 is an apocalyptic number.

It is an amenable number.

285638384 is a deficient number, since it is larger than the sum of its proper divisors (268707832).

285638384 is a wasteful number, since it uses less digits than its factorization.

285638384 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29744 (or 29738 counting only the distinct ones).

The product of its digits is 1105920, while the sum is 47.

The square root of 285638384 is about 16900.8397424507. The cubic root of 285638384 is about 658.5754275066.

The spelling of 285638384 in words is "two hundred eighty-five million, six hundred thirty-eight thousand, three hundred eighty-four".