28286355806 has 4 divisors (see below), whose sum is σ = 42429533712. Its totient is φ = 14143177902.

The previous prime is 28286355803. The next prime is 28286355833. The reversal of 28286355806 is 60855368282.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28286355803) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7071588950 + ... + 7071588953.

It is an arithmetic number, because the mean of its divisors is an integer number (10607383428).

Almost surely, 2^28286355806 is an apocalyptic number.

28286355806 is a deficient number, since it is larger than the sum of its proper divisors (14143177906).

28286355806 is a wasteful number, since it uses less digits than its factorization.

28286355806 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14143177905.

The product of its (nonzero) digits is 5529600, while the sum is 53.

The spelling of 28286355806 in words is "twenty-eight billion, two hundred eighty-six million, three hundred fifty-five thousand, eight hundred six".