285023484 has 72 divisors (see below), whose sum is σ = 784602000. Its totient is φ = 86897664.

The previous prime is 285023483. The next prime is 285023489. The reversal of 285023484 is 484320582.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (285023483) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 12652 + ... + 27020.

It is an arithmetic number, because the mean of its divisors is an integer number (10897250).

Almost surely, 2^285023484 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 285023484, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (392301000).

285023484 is an abundant number, since it is smaller than the sum of its proper divisors (499578516).

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

285023484 is a wasteful number, since it uses less digits than its factorization.

285023484 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14427 (or 14422 counting only the distinct ones).

The product of its (nonzero) digits is 61440, while the sum is 36.

The square root of 285023484 is about 16882.6385378589. The cubic root of 285023484 is about 658.1025114135.

The spelling of 285023484 in words is "two hundred eighty-five million, twenty-three thousand, four hundred eighty-four".