28477343328 has 144 divisors (see below), whose sum is σ = 87028603200. Its totient is φ = 8129743104.

The previous prime is 28477343291. The next prime is 28477343339. The reversal of 28477343328 is 82334377482.

It is a happy number.

It is a super-2 number, since 2×28477343328² (a number of 22 digits) contains 22 as substring.

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, 10549723 + ... + 10552421.

It is an arithmetic number, because the mean of its divisors is an integer number (604365300).

Almost surely, 2^28477343328 is an apocalyptic number.

28477343328 is a gapful number since it is divisible by the number (28) 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 28477343328, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (43514301600).

28477343328 is an abundant number, since it is smaller than the sum of its proper divisors (58551259872).

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

28477343328 is a wasteful number, since it uses less digits than its factorization.

28477343328 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4969 (or 4954 counting only the distinct ones).

The product of its digits is 5419008, while the sum is 51.

The spelling of 28477343328 in words is "twenty-eight billion, four hundred seventy-seven million, three hundred forty-three thousand, three hundred twenty-eight".