838722220 has 72 divisors (see below), whose sum is σ = 2064164256. Its totient is φ = 285417216.

The previous prime is 838722197. The next prime is 838722233. The reversal of 838722220 is 22227838.

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, 131137 + ... + 137383.

It is an arithmetic number, because the mean of its divisors is an integer number (28668948).

Almost surely, 2^838722220 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 838722220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1032082128).

838722220 is an abundant number, since it is smaller than the sum of its proper divisors (1225442036).

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

838722220 is a wasteful number, since it uses less digits than its factorization.

838722220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6407 (or 6398 counting only the distinct ones).

The product of its (nonzero) digits is 21504, while the sum is 34.

The square root of 838722220 is about 28960.7013036632. The cubic root of 838722220 is about 943.0601266808.

The spelling of 838722220 in words is "eight hundred thirty-eight million, seven hundred twenty-two thousand, two hundred twenty".