28453830 has 32 divisors (see below), whose sum is σ = 71884800. Its totient is φ = 7188192.

The previous prime is 28453823. The next prime is 28453861. The reversal of 28453830 is 3835482.

It is a junction number, because it is equal to n+sod(n) for n = 28453791 and 28453800.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 24390 + ... + 25529.

It is an arithmetic number, because the mean of its divisors is an integer number (2246400).

Almost surely, 2^28453830 is an apocalyptic number.

28453830 is an abundant number, since it is smaller than the sum of its proper divisors (43430970).

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

28453830 is a wasteful number, since it uses less digits than its factorization.

28453830 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49948.

The product of its (nonzero) digits is 23040, while the sum is 33.

The square root of 28453830 is about 5334.2131565958. The cubic root of 28453830 is about 305.2907019652.

The spelling of 28453830 in words is "twenty-eight million, four hundred fifty-three thousand, eight hundred thirty".