276528728 has 32 divisors (see below), whose sum is σ = 594704160. Its totient is φ = 118083840.

The previous prime is 276528727. The next prime is 276528737. The reversal of 276528728 is 827825672.

It is a Smith number, since the sum of its digits (47) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (276528727) 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, 6950 + ... + 24522.

It is an arithmetic number, because the mean of its divisors is an integer number (18584505).

Almost surely, 2^276528728 is an apocalyptic number.

276528728 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

276528728 is an abundant number, since it is smaller than the sum of its proper divisors (318175432).

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

276528728 is a wasteful number, since it uses less digits than its factorization.

276528728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17867 (or 17863 counting only the distinct ones).

The product of its digits is 752640, while the sum is 47.

The square root of 276528728 is about 16629.1529549764. The cubic root of 276528728 is about 651.4984977663.

The spelling of 276528728 in words is "two hundred seventy-six million, five hundred twenty-eight thousand, seven hundred twenty-eight".