287728260 has 48 divisors (see below), whose sum is σ = 809846016. Its totient is φ = 76326912.

The previous prime is 287728253. The next prime is 287728261. The reversal of 287728260 is 62827782.

It is not an unprimeable number, because it can be changed into a prime (287728261) 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, 844 + ... + 24003.

It is an arithmetic number, because the mean of its divisors is an integer number (16871792).

Almost surely, 2^287728260 is an apocalyptic number.

287728260 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

287728260 is an abundant number, since it is smaller than the sum of its proper divisors (522117756).

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

287728260 is a wasteful number, since it uses less digits than its factorization.

287728260 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25052 (or 25050 counting only the distinct ones).

The product of its (nonzero) digits is 150528, while the sum is 42.

The square root of 287728260 is about 16962.5546425059. The cubic root of 287728260 is about 660.1776840240.

The spelling of 287728260 in words is "two hundred eighty-seven million, seven hundred twenty-eight thousand, two hundred sixty".