28449316080 has 60 divisors (see below), whose sum is σ = 95542288920. Its totient is φ = 7586484096.

The previous prime is 28449316079. The next prime is 28449316087. The reversal of 28449316080 is 8061394482.

It is a happy number.

28449316080 is a `hidden beast` number, since 2 + 8 + 4 + 4 + 9 + 31 + 608 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (60).

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28449316087) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 19755750 + ... + 19757189.

It is an arithmetic number, because the mean of its divisors is an integer number (1592371482).

Almost surely, 2^28449316080 is an apocalyptic number.

28449316080 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28449316080 is an abundant number, since it is smaller than the sum of its proper divisors (67092972840).

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

28449316080 is a wasteful number, since it uses less digits than its factorization.

28449316080 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39512958 (or 39512949 counting only the distinct ones).

The product of its (nonzero) digits is 331776, while the sum is 45.

The spelling of 28449316080 in words is "twenty-eight billion, four hundred forty-nine million, three hundred sixteen thousand, eighty".