28774601806 has 4 divisors (see below), whose sum is σ = 43161902712. Its totient is φ = 14387300902.

The previous prime is 28774601797. The next prime is 28774601831. The reversal of 28774601806 is 60810647782.

It is a happy number.

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

It is a self number, because there is not a number n which added to its sum of digits gives 28774601806.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7193650450 + ... + 7193650453.

It is an arithmetic number, because the mean of its divisors is an integer number (10790475678).

Almost surely, 2^28774601806 is an apocalyptic number.

28774601806 is a deficient number, since it is larger than the sum of its proper divisors (14387300906).

28774601806 is a wasteful number, since it uses less digits than its factorization.

28774601806 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14387300905.

The product of its (nonzero) digits is 903168, while the sum is 49.

The spelling of 28774601806 in words is "twenty-eight billion, seven hundred seventy-four million, six hundred one thousand, eight hundred six".