285142240 has 24 divisors (see below), whose sum is σ = 673648920. Its totient is φ = 114056832.

The previous prime is 285142229. The next prime is 285142259. The reversal of 285142240 is 42241582.

It is a junction number, because it is equal to n+sod(n) for n = 285142199 and 285142208.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 890910 + ... + 891229.

It is an arithmetic number, because the mean of its divisors is an integer number (28068705).

Almost surely, 2^285142240 is an apocalyptic number.

285142240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

285142240 is an abundant number, since it is smaller than the sum of its proper divisors (388506680).

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

285142240 is a wasteful number, since it uses less digits than its factorization.

285142240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1782154 (or 1782146 counting only the distinct ones).

The product of its (nonzero) digits is 5120, while the sum is 28.

The square root of 285142240 is about 16886.1552758465. The cubic root of 285142240 is about 658.1938989359.

The spelling of 285142240 in words is "two hundred eighty-five million, one hundred forty-two thousand, two hundred forty".