28478571431 has 8 divisors (see below), whose sum is σ = 28555630800. Its totient is φ = 28401549120.

The previous prime is 28478571421. The next prime is 28478571449. The reversal of 28478571431 is 13417587482.

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 28478571431 - 2⁶ = 28478571367 is a prime.

It is a super-2 number, since 2×28478571431² (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 28478571431.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28478571421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2255885 + ... + 2268473.

It is an arithmetic number, because the mean of its divisors is an integer number (3569453850).

Almost surely, 2^28478571431 is an apocalyptic number.

28478571431 is a deficient number, since it is larger than the sum of its proper divisors (77059369).

28478571431 is a wasteful number, since it uses less digits than its factorization.

28478571431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18529.

The product of its digits is 1505280, while the sum is 50.

The spelling of 28478571431 in words is "twenty-eight billion, four hundred seventy-eight million, five hundred seventy-one thousand, four hundred thirty-one".