28308545434 has 24 divisors (see below), whose sum is σ = 46402347420. Its totient is φ = 12945598848.

The previous prime is 28308545423. The next prime is 28308545443. The reversal of 28308545434 is 43454580382.

It can be written as a sum of positive squares in 6 ways, for example, as 7499040409 + 20809505025 = 86597^2 + 144255^2 .

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, 347347 + ... + 421030.

Almost surely, 2^28308545434 is an apocalyptic number.

28308545434 is a deficient number, since it is larger than the sum of its proper divisors (18093801986).

28308545434 is a wasteful number, since it uses less digits than its factorization.

28308545434 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 768514 (or 768501 counting only the distinct ones).

The product of its (nonzero) digits is 1843200, while the sum is 46.

The spelling of 28308545434 in words is "twenty-eight billion, three hundred eight million, five hundred forty-five thousand, four hundred thirty-four".