28118395820460 has 96 divisors (see below), whose sum is σ = 85890942547200. Its totient is φ = 6816420138240.

The previous prime is 28118395820351. The next prime is 28118395820461. The reversal of 28118395820460 is 6402859381182.

It is a super-2 number, since 2×28118395820460² (a number of 28 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 28118395820460.

It is not an unprimeable number, because it can be changed into a prime (28118395820461) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 28816851 + ... + 29776629.

It is an arithmetic number, because the mean of its divisors is an integer number (894697318200).

Almost surely, 2^{28118395820460} is an apocalyptic number.

28118395820460 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28118395820460 is an abundant number, since it is smaller than the sum of its proper divisors (57772546726740).

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

28118395820460 is a wasteful number, since it uses less digits than its factorization.

28118395820460 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1004191 (or 1004189 counting only the distinct ones).

The product of its (nonzero) digits is 6635520, while the sum is 57.

The spelling of 28118395820460 in words is "twenty-eight trillion, one hundred eighteen billion, three hundred ninety-five million, eight hundred twenty thousand, four hundred sixty".