285041280 has 128 divisors (see below), whose sum is σ = 938073600. Its totient is φ = 73543680.

The previous prime is 285041269. The next prime is 285041413. The reversal of 285041280 is 82140582.

It is a tau number, because it is divible by the number of its divisors (128).

It is a Harshad number since it is a multiple of its sum of digits (30).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 57126 + ... + 61914.

It is an arithmetic number, because the mean of its divisors is an integer number (7328700).

Almost surely, 2^285041280 is an apocalyptic number.

285041280 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 285041280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (469036800).

285041280 is an abundant number, since it is smaller than the sum of its proper divisors (653032320).

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

285041280 is a wasteful number, since it uses less digits than its factorization.

285041280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4842 (or 4830 counting only the distinct ones).

The product of its (nonzero) digits is 5120, while the sum is 30.

The square root of 285041280 is about 16883.1655799498. The cubic root of 285041280 is about 658.1162077687.

The spelling of 285041280 in words is "two hundred eighty-five million, forty-one thousand, two hundred eighty".