28320726 has 24 divisors (see below), whose sum is σ = 65889720. Its totient is φ = 8091552.

The previous prime is 28320713. The next prime is 28320731. The reversal of 28320726 is 62702382.

It is a junction number, because it is equal to n+sod(n) for n = 28320693 and 28320702.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 47871 + ... + 48458.

It is an arithmetic number, because the mean of its divisors is an integer number (2745405).

Almost surely, 2^28320726 is an apocalyptic number.

28320726 is an abundant number, since it is smaller than the sum of its proper divisors (37568994).

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

28320726 is a wasteful number, since it uses less digits than its factorization.

28320726 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 96348 (or 96341 counting only the distinct ones).

The product of its (nonzero) digits is 8064, while the sum is 30.

The square root of 28320726 is about 5321.7220896999. The cubic root of 28320726 is about 304.8139185645.

The spelling of 28320726 in words is "twenty-eight million, three hundred twenty thousand, seven hundred twenty-six".