28126752397 has 8 divisors (see below), whose sum is σ = 28409857632. Its totient is φ = 27843738000.

The previous prime is 28126752347. The next prime is 28126752469. The reversal of 28126752397 is 79325762182.

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 a de Polignac number, because none of the positive numbers 2^k-28126752397 is a prime.

It is a super-2 number, since 2×28126752397² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28126752337) 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, 721438 + ... + 759424.

It is an arithmetic number, because the mean of its divisors is an integer number (3551232204).

Almost surely, 2^28126752397 is an apocalyptic number.

It is an amenable number.

28126752397 is a deficient number, since it is larger than the sum of its proper divisors (283105235).

28126752397 is a wasteful number, since it uses less digits than its factorization.

28126752397 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45419.

The product of its digits is 2540160, while the sum is 52.

The spelling of 28126752397 in words is "twenty-eight billion, one hundred twenty-six million, seven hundred fifty-two thousand, three hundred ninety-seven".