28745920328 has 48 divisors (see below), whose sum is σ = 57151048500. Its totient is φ = 13538685440.

The previous prime is 28745920277. The next prime is 28745920393. The reversal of 28745920328 is 82302954782.

It is a happy number.

It can be written as a sum of positive squares in 6 ways, for example, as 226141444 + 28519778884 = 15038^2 + 168878^2 .

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 11 ways as a sum of consecutive naturals, for example, 353138 + ... + 426846.

Almost surely, 2^28745920328 is an apocalyptic number.

It is an amenable number.

28745920328 is a deficient number, since it is larger than the sum of its proper divisors (28405128172).

28745920328 is a wasteful number, since it uses less digits than its factorization.

28745920328 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 73826 (or 73781 counting only the distinct ones).

The product of its (nonzero) digits is 1935360, while the sum is 50.

The spelling of 28745920328 in words is "twenty-eight billion, seven hundred forty-five million, nine hundred twenty thousand, three hundred twenty-eight".