28426684320 has 672 divisors, whose sum is σ = 107882772480. Its totient is φ = 7054387200.

The previous prime is 28426684277. The next prime is 28426684361. The reversal of 28426684320 is 2348662482.

28426684320 is a `hidden beast` number, since 284 + 266 + 84 + 32 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a polite number, since it can be written in 111 ways as a sum of consecutive naturals, for example, 223832097 + ... + 223832223.

It is an arithmetic number, because the mean of its divisors is an integer number (160539840).

Almost surely, 2^28426684320 is an apocalyptic number.

28426684320 is a gapful number since it is divisible by the number (20) 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 28426684320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (53941386240).

28426684320 is an abundant number, since it is smaller than the sum of its proper divisors (79456088160).

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

28426684320 is a wasteful number, since it uses less digits than its factorization.

28426684320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 280 (or 257 counting only the distinct ones).

The product of its (nonzero) digits is 884736, while the sum is 45.

The spelling of 28426684320 in words is "twenty-eight billion, four hundred twenty-six million, six hundred eighty-four thousand, three hundred twenty".