28117465437 has 4 divisors (see below), whose sum is σ = 37489953920. Its totient is φ = 18744976956.

The previous prime is 28117465429. The next prime is 28117465483. The reversal of 28117465437 is 73456471182.

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.

It is not a de Polignac number, because 28117465437 - 2³ = 28117465429 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28117465427) 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, 4686244237 + ... + 4686244242.

It is an arithmetic number, because the mean of its divisors is an integer number (9372488480).

Almost surely, 2^28117465437 is an apocalyptic number.

It is an amenable number.

28117465437 is a deficient number, since it is larger than the sum of its proper divisors (9372488483).

28117465437 is an equidigital number, since it uses as much as digits as its factorization.

28117465437 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9372488482.

The product of its digits is 1128960, while the sum is 48.

The spelling of 28117465437 in words is "twenty-eight billion, one hundred seventeen million, four hundred sixty-five thousand, four hundred thirty-seven".