28530832 has 30 divisors (see below), whose sum is σ = 60764774. Its totient is φ = 12967680.

The previous prime is 28530823. The next prime is 28530839. The reversal of 28530832 is 23803582.

It can be written as a sum of positive squares in only one way, i.e., 27415696 + 1115136 = 5236^2 + 1056^2 .

It is a super-2 number, since 2×28530832² = 1628016749224448, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 28530794 and 28530803.

It is not an unprimeable number, because it can be changed into a prime (28530839) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 5433 + ... + 9304.

Almost surely, 2^28530832 is an apocalyptic number.

28530832 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

28530832 is an abundant number, since it is smaller than the sum of its proper divisors (32233942).

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

28530832 is a wasteful number, since it uses less digits than its factorization.

28530832 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14767 (or 14750 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 31.

The square root of 28530832 is about 5341.4260268209. The cubic root of 28530832 is about 305.5658473570.

The spelling of 28530832 in words is "twenty-eight million, five hundred thirty thousand, eight hundred thirty-two".