28021038148 has 12 divisors (see below), whose sum is σ = 49250952940. Its totient is φ = 13949337312.

The previous prime is 28021038109. The next prime is 28021038173. The reversal of 28021038148 is 84183012082.

It can be written as a sum of positive squares in 2 ways, for example, as 26013818944 + 2007219204 = 161288^2 + 44802^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15294411 + ... + 15296242.

Almost surely, 2^28021038148 is an apocalyptic number.

It is an amenable number.

28021038148 is a deficient number, since it is larger than the sum of its proper divisors (21229914792).

28021038148 is a wasteful number, since it uses less digits than its factorization.

28021038148 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30590886 (or 30590884 counting only the distinct ones).

The product of its (nonzero) digits is 24576, while the sum is 37.

The spelling of 28021038148 in words is "twenty-eight billion, twenty-one million, thirty-eight thousand, one hundred forty-eight".