308409638236 has 96 divisors (see below), whose sum is σ = 644944366080. Its totient is φ = 126282841344.

The previous prime is 308409638231. The next prime is 308409638281. The reversal of 308409638236 is 632836904803.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (308409638231) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 68640006 + ... + 68644498.

It is an arithmetic number, because the mean of its divisors is an integer number (6718170480).

Almost surely, 2^308409638236 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 308409638236, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (322472183040).

308409638236 is an abundant number, since it is smaller than the sum of its proper divisors (336534727844).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

308409638236 is a wasteful number, since it uses less digits than its factorization.

308409638236 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5723 (or 5721 counting only the distinct ones).

The product of its (nonzero) digits is 4478976, while the sum is 52.

The spelling of 308409638236 in words is "three hundred eight billion, four hundred nine million, six hundred thirty-eight thousand, two hundred thirty-six".