438234786 has 80 divisors (see below), whose sum is σ = 1105936128. Its totient is φ = 128498400.

The previous prime is 438234761. The next prime is 438234803. The reversal of 438234786 is 687432834.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 51276 + ... + 59208.

Almost surely, 2^438234786 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 438234786, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (552968064).

438234786 is an abundant number, since it is smaller than the sum of its proper divisors (667701342).

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

438234786 is a wasteful number, since it uses less digits than its factorization.

438234786 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7989 (or 7980 counting only the distinct ones).

The product of its digits is 774144, while the sum is 45.

The square root of 438234786 is about 20934.0580394724. The cubic root of 438234786 is about 759.5720039396.

The spelling of 438234786 in words is "four hundred thirty-eight million, two hundred thirty-four thousand, seven hundred eighty-six".