285101140 has 24 divisors (see below), whose sum is σ = 599227272. Its totient is φ = 113942400.

The previous prime is 285101119. The next prime is 285101143. The reversal of 285101140 is 41101582.

It can be written as a sum of positive squares in 4 ways, for example, as 31684 + 285069456 = 178^2 + 16884^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (285101143) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20542 + ... + 31498.

It is an arithmetic number, because the mean of its divisors is an integer number (24967803).

Almost surely, 2^285101140 is an apocalyptic number.

285101140 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

285101140 is an abundant number, since it is smaller than the sum of its proper divisors (314126132).

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

285101140 is a wasteful number, since it uses less digits than its factorization.

285101140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12267 (or 12265 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 22.

The square root of 285101140 is about 16884.9382586967. The cubic root of 285101140 is about 658.1622737032.

The spelling of 285101140 in words is "two hundred eighty-five million, one hundred one thousand, one hundred forty".