28519732 has 12 divisors (see below), whose sum is σ = 49972356. Its totient is φ = 14241920.

The previous prime is 28519709. The next prime is 28519739. The reversal of 28519732 is 23791582.

It can be written as a sum of positive squares in 2 ways, for example, as 8503056 + 20016676 = 2916^2 + 4474^2 .

It is a super-2 number, since 2×28519732² = 1626750226703648, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 28519691 and 28519700.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28519739) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 523 + ... + 7570.

It is an arithmetic number, because the mean of its divisors is an integer number (4164363).

Almost surely, 2^28519732 is an apocalyptic number.

It is an amenable number.

28519732 is a deficient number, since it is larger than the sum of its proper divisors (21452624).

28519732 is a wasteful number, since it uses less digits than its factorization.

28519732 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8978 (or 8976 counting only the distinct ones).

The product of its digits is 30240, while the sum is 37.

The square root of 28519732 is about 5340.3868773713. The cubic root of 28519732 is about 305.5262151344.

The spelling of 28519732 in words is "twenty-eight million, five hundred nineteen thousand, seven hundred thirty-two".