28928921373 has 24 divisors (see below), whose sum is σ = 45590946336. Its totient is φ = 17530380000.

The previous prime is 28928921363. The next prime is 28928921383. The reversal of 28928921373 is 37312982982.

28928921373 is a `hidden beast` number, since 2 + 89 + 289 + 213 + 73 = 666.

It is an interprime number because it is at equal distance from previous prime (28928921363) and next prime (28928921383).

It is a de Polignac number, because none of the positive numbers 2^k-28928921373 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28928921363) by changing a digit.

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 23 ways as a sum of consecutive naturals, for example, 1025686 + ... + 1053512.

It is an arithmetic number, because the mean of its divisors is an integer number (1899622764).

Almost surely, 2^28928921373 is an apocalyptic number.

It is an amenable number.

28928921373 is a deficient number, since it is larger than the sum of its proper divisors (16662024963).

28928921373 is a wasteful number, since it uses less digits than its factorization.

28928921373 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38345 (or 38342 counting only the distinct ones).

The product of its digits is 2612736, while the sum is 54.

The spelling of 28928921373 in words is "twenty-eight billion, nine hundred twenty-eight million, nine hundred twenty-one thousand, three hundred seventy-three".