28727879544 has 288 divisors, whose sum is σ = 100835280000. Its totient is φ = 7314983424.

The previous prime is 28727879519. The next prime is 28727879591. The reversal of 28727879544 is 44597872782.

28727879544 is a `hidden beast` number, since 2 + 8 + 7 + 2 + 7 + 87 + 9 + 544 = 666.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 1319257 + ... + 1340855.

It is an arithmetic number, because the mean of its divisors is an integer number (350122500).

Almost surely, 2^28727879544 is an apocalyptic number.

28727879544 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28727879544, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (50417640000).

28727879544 is an abundant number, since it is smaller than the sum of its proper divisors (72107400456).

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

28727879544 is a wasteful number, since it uses less digits than its factorization.

28727879544 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21667 (or 21653 counting only the distinct ones).

The product of its digits is 63221760, while the sum is 63.

The spelling of 28727879544 in words is "twenty-eight billion, seven hundred twenty-seven million, eight hundred seventy-nine thousand, five hundred forty-four".