28811806 has 8 divisors (see below), whose sum is σ = 44222904. Its totient is φ = 14070840.

The previous prime is 28811779. The next prime is 28811831. The reversal of 28811806 is 60811882.

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, 167425 + ... + 167596.

It is an arithmetic number, because the mean of its divisors is an integer number (5527863).

Almost surely, 2^28811806 is an apocalyptic number.

28811806 is a deficient number, since it is larger than the sum of its proper divisors (15411098).

28811806 is a wasteful number, since it uses less digits than its factorization.

28811806 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 335066.

The product of its (nonzero) digits is 6144, while the sum is 34.

The square root of 28811806 is about 5367.6629924018. The cubic root of 28811806 is about 306.5656517223.

The spelling of 28811806 in words is "twenty-eight million, eight hundred eleven thousand, eight hundred six".