28180192928 has 12 divisors (see below), whose sum is σ = 55479754890. Its totient is φ = 14090096448.

The previous prime is 28180192903. The next prime is 28180192933. The reversal of 28180192928 is 82929108182.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 26703481744 + 1476711184 = 163412^2 + 38428^2 .

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 as a sum of consecutive naturals, namely, 440315483 + ... + 440315546.

Almost surely, 2^28180192928 is an apocalyptic number.

It is an amenable number.

28180192928 is a deficient number, since it is larger than the sum of its proper divisors (27299561962).

28180192928 is an equidigital number, since it uses as much as digits as its factorization.

28180192928 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 880631039 (or 880631031 counting only the distinct ones).

The product of its (nonzero) digits is 331776, while the sum is 50.

The spelling of 28180192928 in words is "twenty-eight billion, one hundred eighty million, one hundred ninety-two thousand, nine hundred twenty-eight".