28288726 has 8 divisors (see below), whose sum is σ = 42455664. Its totient is φ = 14136840.

The previous prime is 28288703. The next prime is 28288747. The reversal of 28288726 is 62788282.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5416 + ... + 9268.

It is an arithmetic number, because the mean of its divisors is an integer number (5306958).

Almost surely, 2^28288726 is an apocalyptic number.

28288726 is a deficient number, since it is larger than the sum of its proper divisors (14166938).

28288726 is a wasteful number, since it uses less digits than its factorization.

28288726 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7526.

The product of its digits is 172032, while the sum is 43.

The square root of 28288726 is about 5318.7146943599. The cubic root of 28288726 is about 304.6990707383.

The spelling of 28288726 in words is "twenty-eight million, two hundred eighty-eight thousand, seven hundred twenty-six".