28279727 has 8 divisors (see below), whose sum is σ = 33434400. Its totient is φ = 23403744.

The previous prime is 28279717. The next prime is 28279747. The reversal of 28279727 is 72797282.

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

It is a de Polignac number, because none of the positive numbers 2^k-28279727 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28279717) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 69452 + ... + 69857.

It is an arithmetic number, because the mean of its divisors is an integer number (4179300).

Almost surely, 2^28279727 is an apocalyptic number.

28279727 is a deficient number, since it is larger than the sum of its proper divisors (5154673).

28279727 is a wasteful number, since it uses less digits than its factorization.

28279727 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 139345.

The product of its digits is 197568, while the sum is 44.

The square root of 28279727 is about 5317.8686520071. The cubic root of 28279727 is about 304.6667577745. Note that the first 3 decimals are identical.

The spelling of 28279727 in words is "twenty-eight million, two hundred seventy-nine thousand, seven hundred twenty-seven".