285143628 has 48 divisors (see below), whose sum is σ = 829511424. Its totient is φ = 74063040.

The previous prime is 285143623. The next prime is 285143641. The reversal of 285143628 is 826341582.

It is not an unprimeable number, because it can be changed into a prime (285143623) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 153375 + ... + 155222.

It is an arithmetic number, because the mean of its divisors is an integer number (17281488).

Almost surely, 2^285143628 is an apocalyptic number.

285143628 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

285143628 is an abundant number, since it is smaller than the sum of its proper divisors (544367796).

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

285143628 is a wasteful number, since it uses less digits than its factorization.

285143628 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 308622 (or 308620 counting only the distinct ones).

The product of its digits is 92160, while the sum is 39.

The square root of 285143628 is about 16886.1963745540. The cubic root of 285143628 is about 658.1949669077.

The spelling of 285143628 in words is "two hundred eighty-five million, one hundred forty-three thousand, six hundred twenty-eight".