285431384 has 32 divisors (see below), whose sum is σ = 631372800. Its totient is φ = 118380960.

The previous prime is 285431371. The next prime is 285431401. The reversal of 285431384 is 483134582.

It is a happy number.

It is a hoax number, since the sum of its digits (38) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 80474 + ... + 83945.

It is an arithmetic number, because the mean of its divisors is an integer number (19730400).

Almost surely, 2^285431384 is an apocalyptic number.

It is an amenable number.

285431384 is an abundant number, since it is smaller than the sum of its proper divisors (345941416).

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

285431384 is a wasteful number, since it uses less digits than its factorization.

285431384 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 164463 (or 164459 counting only the distinct ones).

The product of its digits is 92160, while the sum is 38.

The square root of 285431384 is about 16894.7146764898. The cubic root of 285431384 is about 658.4163008326.

The spelling of 285431384 in words is "two hundred eighty-five million, four hundred thirty-one thousand, three hundred eighty-four".