838348644 has 72 divisors (see below), whose sum is σ = 2306807328. Its totient is φ = 236234880.

The previous prime is 838348639. The next prime is 838348663. The reversal of 838348644 is 446843838.

It is a junction number, because it is equal to n+sod(n) for n = 838348593 and 838348602.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 33159 + ... + 52689.

Almost surely, 2^838348644 is an apocalyptic number.

838348644 is a gapful number since it is divisible by the number (84) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 838348644, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1153403664).

838348644 is an abundant number, since it is smaller than the sum of its proper divisors (1468458684).

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

838348644 is a wasteful number, since it uses less digits than its factorization.

838348644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19625 (or 19616 counting only the distinct ones).

The product of its digits is 1769472, while the sum is 48.

The square root of 838348644 is about 28954.2508796204. The cubic root of 838348644 is about 942.9200894745.

The spelling of 838348644 in words is "eight hundred thirty-eight million, three hundred forty-eight thousand, six hundred forty-four".