28609822437 has 8 divisors (see below), whose sum is σ = 43595919936. Its totient is φ = 16348469952.

The previous prime is 28609822411. The next prime is 28609822471. The reversal of 28609822437 is 73422890682.

It is a happy number.

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

It is not a de Polignac number, because 28609822437 - 2⁷ = 28609822309 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 28609822437.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28609822037) 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, 681186228 + ... + 681186269.

It is an arithmetic number, because the mean of its divisors is an integer number (5449489992).

Almost surely, 2^28609822437 is an apocalyptic number.

It is an amenable number.

28609822437 is a deficient number, since it is larger than the sum of its proper divisors (14986097499).

28609822437 is a wasteful number, since it uses less digits than its factorization.

28609822437 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1362372507.

The product of its (nonzero) digits is 2322432, while the sum is 51.

The spelling of 28609822437 in words is "twenty-eight billion, six hundred nine million, eight hundred twenty-two thousand, four hundred thirty-seven".