28432218874 has 8 divisors (see below), whose sum is σ = 42774882228. Its totient is φ = 14173924800.

The previous prime is 28432218847. The next prime is 28432218907. The reversal of 28432218874 is 47881223482.

It can be written as a sum of positive squares in 2 ways, for example, as 22322451649 + 6109767225 = 149407^2 + 78165^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21091477 + ... + 21092824.

Almost surely, 2^28432218874 is an apocalyptic number.

28432218874 is a deficient number, since it is larger than the sum of its proper divisors (14342663354).

28432218874 is a wasteful number, since it uses less digits than its factorization.

28432218874 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42184640.

The product of its digits is 1376256, while the sum is 49.

The spelling of 28432218874 in words is "twenty-eight billion, four hundred thirty-two million, two hundred eighteen thousand, eight hundred seventy-four".