28345491456 has 112 divisors (see below), whose sum is σ = 78871169664. Its totient is φ = 9037512704.

The previous prime is 28345491439. The next prime is 28345491457. The reversal of 28345491456 is 65419454382.

It is a happy number.

It is a Smith number, since the sum of its digits (51) coincides with the sum of the digits of its prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 28345491399 and 28345491408.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28345491457) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 540175 + ... + 590321.

It is an arithmetic number, because the mean of its divisors is an integer number (704206872).

Almost surely, 2^28345491456 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 28345491456, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (39435584832).

28345491456 is an abundant number, since it is smaller than the sum of its proper divisors (50525678208).

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

28345491456 is an equidigital number, since it uses as much as digits as its factorization.

28345491456 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50199 (or 50175 counting only the distinct ones).

The product of its digits is 4147200, while the sum is 51.

The spelling of 28345491456 in words is "twenty-eight billion, three hundred forty-five million, four hundred ninety-one thousand, four hundred fifty-six".