28478554736 has 80 divisors (see below), whose sum is σ = 60884103168. Its totient is φ = 12859123200.

The previous prime is 28478554693. The next prime is 28478554739. The reversal of 28478554736 is 63745587482.

It is a super-2 number, since 2×28478554736² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28478554739) 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, 437285 + ... + 498171.

Almost surely, 2^28478554736 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 28478554736, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30442051584).

28478554736 is an abundant number, since it is smaller than the sum of its proper divisors (32405548432).

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

28478554736 is a wasteful number, since it uses less digits than its factorization.

28478554736 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60990 (or 60984 counting only the distinct ones).

The product of its digits is 45158400, while the sum is 59.

The spelling of 28478554736 in words is "twenty-eight billion, four hundred seventy-eight million, five hundred fifty-four thousand, seven hundred thirty-six".