28849877784 has 432 divisors, whose sum is σ = 101746060200. Its totient is φ = 7548847488.

The previous prime is 28849877779. The next prime is 28849877831. The reversal of 28849877784 is 48777894882.

It is a powerful number, because all its prime factors have an exponent greater than 1 and also an Achilles number because it is not a perfect power.

It is a Harshad number since it is a multiple of its sum of digits (72).

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 107 ways as a sum of consecutive naturals, for example, 227164329 + ... + 227164455.

Almost surely, 2^28849877784 is an apocalyptic number.

28849877784 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 28849877784, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (50873030100).

28849877784 is an abundant number, since it is smaller than the sum of its proper divisors (72896182416).

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

28849877784 is a wasteful number, since it uses less digits than its factorization.

28849877784 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 309 (or 152 counting only the distinct ones).

The product of its digits is 404619264, while the sum is 72.

The spelling of 28849877784 in words is "twenty-eight billion, eight hundred forty-nine million, eight hundred seventy-seven thousand, seven hundred eighty-four".