28774801830 has 32 divisors (see below), whose sum is σ = 69305308128. Its totient is φ = 7645971200.

The previous prime is 28774801823. The next prime is 28774801831. The reversal of 28774801830 is 3810847782.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 28774801830.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28774801831) by changing a digit.

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 in 15 ways as a sum of consecutive naturals, for example, 1698261 + ... + 1715120.

It is an arithmetic number, because the mean of its divisors is an integer number (2165790879).

Almost surely, 2^28774801830 is an apocalyptic number.

28774801830 is an abundant number, since it is smaller than the sum of its proper divisors (40530506298).

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

28774801830 is a wasteful number, since it uses less digits than its factorization.

28774801830 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3413672.

The product of its (nonzero) digits is 602112, while the sum is 48.

The spelling of 28774801830 in words is "twenty-eight billion, seven hundred seventy-four million, eight hundred one thousand, eight hundred thirty".