5428172857 has 4 divisors (see below), whose sum is σ = 5436486180. Its totient is φ = 5419859536.

The previous prime is 5428172831. The next prime is 5428172863. The reversal of 5428172857 is 7582718245.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 1271920896 + 4156251961 = 35664^2 + 64469^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-5428172857 is a prime.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 5428172857.

It is not an unprimeable number, because it can be changed into a prime (5428172257) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4155682 + ... + 4156987.

It is an arithmetic number, because the mean of its divisors is an integer number (1359121545).

Almost surely, 2^5428172857 is an apocalyptic number.

It is an amenable number.

5428172857 is a deficient number, since it is larger than the sum of its proper divisors (8313323).

5428172857 is an equidigital number, since it uses as much as digits as its factorization.

5428172857 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8313322.

The product of its digits is 1254400, while the sum is 49.

The square root of 5428172857 is about 73676.1349216963. The cubic root of 5428172857 is about 1757.4563868831.

The spelling of 5428172857 in words is "five billion, four hundred twenty-eight million, one hundred seventy-two thousand, eight hundred fifty-seven".