28234143556 has 6 divisors (see below), whose sum is σ = 49409751230. Its totient is φ = 14117071776.

The previous prime is 28234143551. The next prime is 28234143571. The reversal of 28234143556 is 65534143282.

It can be written as a sum of positive squares in only one way, i.e., 24325393156 + 3908750400 = 155966^2 + 62520^2 .

It is not an unprimeable number, because it can be changed into a prime (28234143551) by changing a digit.

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 as a sum of consecutive naturals, namely, 3529267941 + ... + 3529267948.

Almost surely, 2^28234143556 is an apocalyptic number.

It is an amenable number.

28234143556 is a deficient number, since it is larger than the sum of its proper divisors (21175607674).

28234143556 is a wasteful number, since it uses less digits than its factorization.

28234143556 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7058535893 (or 7058535891 counting only the distinct ones).

The product of its digits is 691200, while the sum is 43.

The spelling of 28234143556 in words is "twenty-eight billion, two hundred thirty-four million, one hundred forty-three thousand, five hundred fifty-six".