28234344637 has 8 divisors (see below), whose sum is σ = 28422298872. Its totient is φ = 28046976000.

The previous prime is 28234344569. The next prime is 28234344683. The reversal of 28234344637 is 73644343282.

It can be written as a sum of positive squares in 4 ways, for example, as 15342785956 + 12891558681 = 123866^2 + 113541^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28234344637 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 (28234344037) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 49438 + ... + 242719.

It is an arithmetic number, because the mean of its divisors is an integer number (3552787359).

Almost surely, 2^28234344637 is an apocalyptic number.

It is an amenable number.

28234344637 is a deficient number, since it is larger than the sum of its proper divisors (187954235).

28234344637 is a wasteful number, since it uses less digits than its factorization.

28234344637 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 292799.

The product of its digits is 2322432, while the sum is 46.

The spelling of 28234344637 in words is "twenty-eight billion, two hundred thirty-four million, three hundred forty-four thousand, six hundred thirty-seven".