28394946064 has 45 divisors (see below), whose sum is σ = 55690684173. Its totient is φ = 14025257856.

The previous prime is 28394946043. The next prime is 28394946071. The reversal of 28394946064 is 46064949382.

The square root of 28394946064 is 168508.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 25950632464 + 2444313600 = 161092^2 + 49440^2 .

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 28394945996 and 28394946014.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 69425092 + ... + 69425500.

Almost surely, 2^28394946064 is an apocalyptic number.

28394946064 is the 168508-th square number.

It is an amenable number.

28394946064 is a deficient number, since it is larger than the sum of its proper divisors (27295738109).

28394946064 is an frugal number, since it uses more digits than its factorization.

28394946064 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1032 (or 514 counting only the distinct ones).

The product of its (nonzero) digits is 8957952, while the sum is 55.

The spelling of 28394946064 in words is "twenty-eight billion, three hundred ninety-four million, nine hundred forty-six thousand, sixty-four".