28034530 has 32 divisors (see below), whose sum is σ = 54886896. Its totient is φ = 10266624.

The previous prime is 28034521. The next prime is 28034537. The reversal of 28034530 is 3543082.

It can be written as a sum of positive squares in 8 ways, for example, as 24235929 + 3798601 = 4923^2 + 1949^2 .

It is a junction number, because it is equal to n+sod(n) for n = 28034495 and 28034504.

It is not an unprimeable number, because it can be changed into a prime (28034537) 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, 4062 + ... + 8518.

Almost surely, 2^28034530 is an apocalyptic number.

28034530 is a deficient number, since it is larger than the sum of its proper divisors (26852366).

28034530 is a wasteful number, since it uses less digits than its factorization.

28034530 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4518.

The product of its (nonzero) digits is 2880, while the sum is 25.

The square root of 28034530 is about 5294.7643951360. The cubic root of 28034530 is about 303.7836714072.

The spelling of 28034530 in words is "twenty-eight million, thirty-four thousand, five hundred thirty".