28251412715 has 8 divisors (see below), whose sum is σ = 34817957520. Its totient is φ = 21990288672.

The previous prime is 28251412711. The next prime is 28251412723. The reversal of 28251412715 is 51721415282.

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 28251412715 - 2² = 28251412711 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28251412711) 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, 76354985 + ... + 76355354.

It is an arithmetic number, because the mean of its divisors is an integer number (4352244690).

Almost surely, 2^28251412715 is an apocalyptic number.

28251412715 is a deficient number, since it is larger than the sum of its proper divisors (6566544805).

28251412715 is a wasteful number, since it uses less digits than its factorization.

28251412715 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 152710381.

The product of its digits is 44800, while the sum is 38.

Adding to 28251412715 its reverse (51721415282), we get a palindrome (79972827997).

The spelling of 28251412715 in words is "twenty-eight billion, two hundred fifty-one million, four hundred twelve thousand, seven hundred fifteen".