285255144 has 24 divisors (see below), whose sum is σ = 772566210. Its totient is φ = 95085024.

The previous prime is 285255137. The next prime is 285255161. The reversal of 285255144 is 441552582.

It can be written as a sum of positive squares in only one way, i.e., 186650244 + 98604900 = 13662^2 + 9930^2 .

It is a tau number, because it is divible by the number of its divisors (24).

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

It is a junction number, because it is equal to n+sod(n) for n = 285255099 and 285255108.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1980867 + ... + 1981010.

Almost surely, 2^285255144 is an apocalyptic number.

285255144 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

285255144 is an abundant number, since it is smaller than the sum of its proper divisors (487311066).

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

285255144 is a wasteful number, since it uses less digits than its factorization.

285255144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3961889 (or 3961882 counting only the distinct ones).

The product of its digits is 64000, while the sum is 36.

The square root of 285255144 is about 16889.4980387222. The cubic root of 285255144 is about 658.2807595824.

The spelling of 285255144 in words is "two hundred eighty-five million, two hundred fifty-five thousand, one hundred forty-four".