285144540 has 24 divisors (see below), whose sum is σ = 798404880. Its totient is φ = 76038528.

The previous prime is 285144529. The next prime is 285144551. The reversal of 285144540 is 45441582.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (285144529) and next prime (285144551).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2376145 + ... + 2376264.

It is an arithmetic number, because the mean of its divisors is an integer number (33266870).

Almost surely, 2^285144540 is an apocalyptic number.

285144540 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

285144540 is an abundant number, since it is smaller than the sum of its proper divisors (513260340).

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

285144540 is a wasteful number, since it uses less digits than its factorization.

285144540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4752421 (or 4752419 counting only the distinct ones).

The product of its (nonzero) digits is 25600, while the sum is 33.

The square root of 285144540 is about 16886.2233788376. The cubic root of 285144540 is about 658.1956686280.

The spelling of 285144540 in words is "two hundred eighty-five million, one hundred forty-four thousand, five hundred forty".