28434572918 has 4 divisors (see below), whose sum is σ = 42651859380. Its totient is φ = 14217286458.

The previous prime is 28434572863. The next prime is 28434572923. The reversal of 28434572918 is 81927543482.

It is a semiprime because it is the product of two primes.

It is a self number, because there is not a number n which added to its sum of digits gives 28434572918.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7108643228 + ... + 7108643231.

It is an arithmetic number, because the mean of its divisors is an integer number (10662964845).

Almost surely, 2^28434572918 is an apocalyptic number.

28434572918 is a deficient number, since it is larger than the sum of its proper divisors (14217286462).

28434572918 is a wasteful number, since it uses less digits than its factorization.

28434572918 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14217286461.

The product of its digits is 3870720, while the sum is 53.

The spelling of 28434572918 in words is "twenty-eight billion, four hundred thirty-four million, five hundred seventy-two thousand, nine hundred eighteen".