28831450457 has 4 divisors (see below), whose sum is σ = 29237527296. Its totient is φ = 28425373620.

The previous prime is 28831450433. The next prime is 28831450471. The reversal of 28831450457 is 75405413882.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 75405413882 = 2 ⋅37702706941.

It is a cyclic number.

It is not a de Polignac number, because 28831450457 - 2¹⁶ = 28831384921 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28831450477) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 203038313 + ... + 203038454.

It is an arithmetic number, because the mean of its divisors is an integer number (7309381824).

Almost surely, 2^28831450457 is an apocalyptic number.

It is an amenable number.

28831450457 is a deficient number, since it is larger than the sum of its proper divisors (406076839).

28831450457 is an equidigital number, since it uses as much as digits as its factorization.

28831450457 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 406076838.

The product of its (nonzero) digits is 1075200, while the sum is 47.

The spelling of 28831450457 in words is "twenty-eight billion, eight hundred thirty-one million, four hundred fifty thousand, four hundred fifty-seven".