28147473425 has 12 divisors (see below), whose sum is σ = 35846188956. Its totient is φ = 21909384000.

The previous prime is 28147473421. The next prime is 28147473433. The reversal of 28147473425 is 52437474182.

It can be written as a sum of positive squares in 6 ways, for example, as 9759376 + 28137714049 = 3124^2 + 167743^2 .

It is not a de Polignac number, because 28147473425 - 2² = 28147473421 is a prime.

It is a super-2 number, since 2×28147473425² (a number of 22 digits) contains 22 as substring.

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 28147473425.

It is not an unprimeable number, because it can be changed into a prime (28147473421) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 15213926 + ... + 15215775.

It is an arithmetic number, because the mean of its divisors is an integer number (2987182413).

Almost surely, 2^28147473425 is an apocalyptic number.

28147473425 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

28147473425 is a deficient number, since it is larger than the sum of its proper divisors (7698715531).

28147473425 is a wasteful number, since it uses less digits than its factorization.

28147473425 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30429748 (or 30429743 counting only the distinct ones).

The product of its digits is 1505280, while the sum is 47.

The spelling of 28147473425 in words is "twenty-eight billion, one hundred forty-seven million, four hundred seventy-three thousand, four hundred twenty-five".