28581143870 has 32 divisors (see below), whose sum is σ = 55474584480. Its totient is φ = 10566581760.

The previous prime is 28581143863. The next prime is 28581143881. The reversal of 28581143870 is 7834118582.

It is a congruent number.

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 15 ways as a sum of consecutive naturals, for example, 1826687 + ... + 1842266.

It is an arithmetic number, because the mean of its divisors is an integer number (1733580765).

Almost surely, 2^28581143870 is an apocalyptic number.

28581143870 is a deficient number, since it is larger than the sum of its proper divisors (26893440610).

28581143870 is a wasteful number, since it uses less digits than its factorization.

28581143870 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3669020.

The product of its (nonzero) digits is 430080, while the sum is 47.

The spelling of 28581143870 in words is "twenty-eight billion, five hundred eighty-one million, one hundred forty-three thousand, eight hundred seventy".