28414377018 has 60 divisors (see below), whose sum is σ = 63911643642. Its totient is φ = 9435534480.

The previous prime is 28414376959. The next prime is 28414377023. The reversal of 28414377018 is 81077341482.

It can be written as a sum of positive squares in only one way, i.e., 28406742849 + 7634169 = 168543^2 + 2763^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 29 ways as a sum of consecutive naturals, for example, 15267408 + ... + 15269268.

Almost surely, 2^28414377018 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28414377018, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31955821821).

28414377018 is an abundant number, since it is smaller than the sum of its proper divisors (35497266624).

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

28414377018 is an equidigital number, since it uses as much as digits as its factorization.

28414377018 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2489 (or 2173 counting only the distinct ones).

The product of its (nonzero) digits is 301056, while the sum is 45.

The spelling of 28414377018 in words is "twenty-eight billion, four hundred fourteen million, three hundred seventy-seven thousand, eighteen".