276532864 has 128 divisors (see below), whose sum is σ = 616896000. Its totient is φ = 123002880.

The previous prime is 276532847. The next prime is 276532873. The reversal of 276532864 is 468235672.

It is a tau number, because it is divible by the number of its divisors (128).

It is a self number, because there is not a number n which added to its sum of digits gives 276532864.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3500377 + ... + 3500455.

It is an arithmetic number, because the mean of its divisors is an integer number (4819500).

Almost surely, 2^276532864 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 276532864, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (308448000).

276532864 is an abundant number, since it is smaller than the sum of its proper divisors (340363136).

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

276532864 is a wasteful number, since it uses less digits than its factorization.

276532864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 186 (or 174 counting only the distinct ones).

The product of its digits is 483840, while the sum is 43.

The square root of 276532864 is about 16629.2773144235. The cubic root of 276532864 is about 651.5017458729.

The spelling of 276532864 in words is "two hundred seventy-six million, five hundred thirty-two thousand, eight hundred sixty-four".