28424086656 has 128 divisors (see below), whose sum is σ = 86676172800. Its totient is φ = 8084579328.

The previous prime is 28424086601. The next prime is 28424086657. The reversal of 28424086656 is 65668042482.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (128).

It is a junction number, because it is equal to n+sod(n) for n = 28424086599 and 28424086608.

It is not an unprimeable number, because it can be changed into a prime (28424086657) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 575715 + ... + 623133.

It is an arithmetic number, because the mean of its divisors is an integer number (677157600).

Almost surely, 2^28424086656 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28424086656, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (43338086400).

28424086656 is an abundant number, since it is smaller than the sum of its proper divisors (58252086144).

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

28424086656 is a wasteful number, since it uses less digits than its factorization.

28424086656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47666 (or 47654 counting only the distinct ones).

The product of its (nonzero) digits is 4423680, while the sum is 51.

The spelling of 28424086656 in words is "twenty-eight billion, four hundred twenty-four million, eighty-six thousand, six hundred fifty-six".