28520276 has 24 divisors (see below), whose sum is σ = 52450944. Its totient is φ = 13543200.

The previous prime is 28520269. The next prime is 28520287. The reversal of 28520276 is 67202582.

It is a super-2 number, since 2×28520276² = 1626812286232352, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12866 + ... + 14918.

It is an arithmetic number, because the mean of its divisors is an integer number (2185456).

Almost surely, 2^28520276 is an apocalyptic number.

It is an amenable number.

28520276 is a deficient number, since it is larger than the sum of its proper divisors (23930668).

28520276 is a wasteful number, since it uses less digits than its factorization.

28520276 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2231 (or 2229 counting only the distinct ones).

The product of its (nonzero) digits is 13440, while the sum is 32.

The square root of 28520276 is about 5340.4378097680. The cubic root of 28520276 is about 305.5281577099.

The spelling of 28520276 in words is "twenty-eight million, five hundred twenty thousand, two hundred seventy-six".