28877791824 has 120 divisors (see below), whose sum is σ = 92436980480. Its totient is φ = 8244198144.

The previous prime is 28877791799. The next prime is 28877791837. The reversal of 28877791824 is 42819777882.

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

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 23 ways as a sum of consecutive naturals, for example, 1326822 + ... + 1348410.

Almost surely, 2^28877791824 is an apocalyptic number.

28877791824 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 28877791824, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (46218490240).

28877791824 is an abundant number, since it is smaller than the sum of its proper divisors (63559188656).

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

28877791824 is a wasteful number, since it uses less digits than its factorization.

28877791824 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22937 (or 22928 counting only the distinct ones).

The product of its digits is 25288704, while the sum is 63.

The spelling of 28877791824 in words is "twenty-eight billion, eight hundred seventy-seven million, seven hundred ninety-one thousand, eight hundred twenty-four".