28308219456 has 56 divisors (see below), whose sum is σ = 81707821344. Its totient is φ = 8578247680.

The previous prime is 28308219451. The next prime is 28308219463. The reversal of 28308219456 is 65491280382.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is not an unprimeable number, because it can be changed into a prime (28308219451) 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, 6699645 + ... + 6703868.

Almost surely, 2^28308219456 is an apocalyptic number.

It is an amenable number.

28308219456 is an abundant number, since it is smaller than the sum of its proper divisors (53399601888).

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

28308219456 is a wasteful number, since it uses less digits than its factorization.

28308219456 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13403539 (or 13403529 counting only the distinct ones).

The product of its (nonzero) digits is 829440, while the sum is 48.

The spelling of 28308219456 in words is "twenty-eight billion, three hundred eight million, two hundred nineteen thousand, four hundred fifty-six".