28334737321 has 4 divisors (see below), whose sum is σ = 30910622544. Its totient is φ = 25758852100.

The previous prime is 28334737283. The next prime is 28334737349. The reversal of 28334737321 is 12373743382.

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 a cyclic number.

It is not a de Polignac number, because 28334737321 - 2⁹ = 28334736809 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28334737021) 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, 1287942595 + ... + 1287942616.

It is an arithmetic number, because the mean of its divisors is an integer number (7727655636).

Almost surely, 2^28334737321 is an apocalyptic number.

It is an amenable number.

28334737321 is a deficient number, since it is larger than the sum of its proper divisors (2575885223).

28334737321 is a wasteful number, since it uses less digits than its factorization.

28334737321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2575885222.

The product of its digits is 508032, while the sum is 43.

The spelling of 28334737321 in words is "twenty-eight billion, three hundred thirty-four million, seven hundred thirty-seven thousand, three hundred twenty-one".