28262530 has 32 divisors (see below), whose sum is σ = 53933040. Its totient is φ = 10644480.

The previous prime is 28262513. The next prime is 28262537. The reversal of 28262530 is 3526282.

It can be written as a sum of positive squares in 8 ways, for example, as 4124961 + 24137569 = 2031^2 + 4913^2 .

It is not an unprimeable number, because it can be changed into a prime (28262537) 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, 10702 + ... + 13078.

Almost surely, 2^28262530 is an apocalyptic number.

28262530 is a deficient number, since it is larger than the sum of its proper divisors (25670510).

28262530 is a wasteful number, since it uses less digits than its factorization.

28262530 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2454.

The product of its (nonzero) digits is 5760, while the sum is 28.

The square root of 28262530 is about 5316.2514989417. The cubic root of 28262530 is about 304.6049889484.

It can be divided in two parts, 2826 and 2530, that added together give a triangular number (5356 = T₁₀₃).

The spelling of 28262530 in words is "twenty-eight million, two hundred sixty-two thousand, five hundred thirty".