28774244547 has 56 divisors (see below), whose sum is σ = 45265519488. Its totient is φ = 18258825600.

The previous prime is 28774244459. The next prime is 28774244573. The reversal of 28774244547 is 74544247782.

28774244547 is a `hidden beast` number, since 2 + 8 + 7 + 74 + 24 + 4 + 547 = 666.

It is not a de Polignac number, because 28774244547 - 2¹⁵ = 28774211779 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 28774244493 and 28774244502.

It is not an unprimeable number, because it can be changed into a prime (28774244747) by changing a digit.

It is a polite number, since it can be written in 55 ways as a sum of consecutive naturals, for example, 1368103 + ... + 1388975.

It is an arithmetic number, because the mean of its divisors is an integer number (808312848).

Almost surely, 2^28774244547 is an apocalyptic number.

28774244547 is a gapful number since it is divisible by the number (27) formed by its first and last digit.

28774244547 is a deficient number, since it is larger than the sum of its proper divisors (16491274941).

28774244547 is an equidigital number, since it uses as much as digits as its factorization.

28774244547 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20983 (or 20968 counting only the distinct ones).

The product of its digits is 14049280, while the sum is 54.

It can be divided in two parts, 2877 and 4244547, that added together give a palindrome (4247424).

The spelling of 28774244547 in words is "twenty-eight billion, seven hundred seventy-four million, two hundred forty-four thousand, five hundred forty-seven".