28531726 has 8 divisors (see below), whose sum is σ = 43708320. Its totient is φ = 13962288.

The previous prime is 28531717. The next prime is 28531733. The reversal of 28531726 is 62713582.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 28531691 and 28531700.

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 3 ways as a sum of consecutive naturals, for example, 151671 + ... + 151858.

It is an arithmetic number, because the mean of its divisors is an integer number (5463540).

Almost surely, 2^28531726 is an apocalyptic number.

28531726 is a deficient number, since it is larger than the sum of its proper divisors (15176594).

28531726 is a wasteful number, since it uses less digits than its factorization.

28531726 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 303578.

The product of its digits is 20160, while the sum is 34.

The square root of 28531726 is about 5341.5097116826. The cubic root of 28531726 is about 305.5690389104.

The spelling of 28531726 in words is "twenty-eight million, five hundred thirty-one thousand, seven hundred twenty-six".