28647726 has 16 divisors (see below), whose sum is σ = 58151424. Its totient is φ = 9406584.

The previous prime is 28647721. The next prime is 28647727. The reversal of 28647726 is 62774682.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28647721) 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, 35230 + ... + 36033.

It is an arithmetic number, because the mean of its divisors is an integer number (3634464).

Almost surely, 2^28647726 is an apocalyptic number.

28647726 is an abundant number, since it is smaller than the sum of its proper divisors (29503698).

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

28647726 is a wasteful number, since it uses less digits than its factorization.

28647726 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71335.

The product of its digits is 225792, while the sum is 42.

The square root of 28647726 is about 5352.3570508702. The cubic root of 28647726 is about 305.9825911750.

The spelling of 28647726 in words is "twenty-eight million, six hundred forty-seven thousand, seven hundred twenty-six".