28180330344 has 48 divisors (see below), whose sum is σ = 76348727520. Its totient is φ = 9390120480.

The previous prime is 28180330309. The next prime is 28180330393. The reversal of 28180330344 is 44303308182.

It is a happy number.

28180330344 is a `hidden beast` number, since 281 + 8 + 0 + 3 + 30 + 344 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 28180330299 and 28180330308.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 140079 + ... + 275649.

It is an arithmetic number, because the mean of its divisors is an integer number (1590598490).

Almost surely, 2^28180330344 is an apocalyptic number.

28180330344 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

28180330344 is an abundant number, since it is smaller than the sum of its proper divisors (48168397176).

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

28180330344 is a wasteful number, since it uses less digits than its factorization.

28180330344 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 138470 (or 138463 counting only the distinct ones).

The product of its (nonzero) digits is 55296, while the sum is 36.

The spelling of 28180330344 in words is "twenty-eight billion, one hundred eighty million, three hundred thirty thousand, three hundred forty-four".