28134693121 has 8 divisors (see below), whose sum is σ = 29552367744. Its totient is φ = 26733220800.

The previous prime is 28134693113. The next prime is 28134693143. The reversal of 28134693121 is 12139643182.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 28134693121 - 2³ = 28134693113 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28134693101) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4047016 + ... + 4053961.

It is an arithmetic number, because the mean of its divisors is an integer number (3694045968).

Almost surely, 2^28134693121 is an apocalyptic number.

It is an amenable number.

28134693121 is a deficient number, since it is larger than the sum of its proper divisors (1417674623).

28134693121 is a wasteful number, since it uses less digits than its factorization.

28134693121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8101151.

The product of its digits is 62208, while the sum is 40.

The spelling of 28134693121 in words is "twenty-eight billion, one hundred thirty-four million, six hundred ninety-three thousand, one hundred twenty-one".