28820806 has 8 divisors (see below), whose sum is σ = 49407120. Its totient is φ = 12351768.

The previous prime is 28820801. The next prime is 28820807. The reversal of 28820806 is 60802882.

It is a happy number.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28820801) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1029301 + ... + 1029328.

It is an arithmetic number, because the mean of its divisors is an integer number (6175890).

Almost surely, 2^28820806 is an apocalyptic number.

28820806 is a deficient number, since it is larger than the sum of its proper divisors (20586314).

28820806 is a wasteful number, since it uses less digits than its factorization.

28820806 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2058638.

The product of its (nonzero) digits is 12288, while the sum is 34.

The square root of 28820806 is about 5368.5012806183. The cubic root of 28820806 is about 306.5975692359.

The spelling of 28820806 in words is "twenty-eight million, eight hundred twenty thousand, eight hundred six".