28774474840 has 32 divisors (see below), whose sum is σ = 64757155680. Its totient is φ = 11507196672.

The previous prime is 28774474837. The next prime is 28774474847. The reversal of 28774474840 is 4847447782.

It is a Smith number, since the sum of its digits (55) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28774474847) 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 7 ways as a sum of consecutive naturals, for example, 103924 + ... + 261436.

It is an arithmetic number, because the mean of its divisors is an integer number (2023661115).

Almost surely, 2^28774474840 is an apocalyptic number.

28774474840 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28774474840 is an abundant number, since it is smaller than the sum of its proper divisors (35982680840).

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

28774474840 is a wasteful number, since it uses less digits than its factorization.

28774474840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 162091 (or 162087 counting only the distinct ones).

The product of its (nonzero) digits is 11239424, while the sum is 55.

The spelling of 28774474840 in words is "twenty-eight billion, seven hundred seventy-four million, four hundred seventy-four thousand, eight hundred forty".