438423380 has 12 divisors (see below), whose sum is σ = 920689140. Its totient is φ = 175369344.

The previous prime is 438423371. The next prime is 438423383. The reversal of 438423380 is 83324834.

It can be written as a sum of positive squares in 2 ways, for example, as 340254916 + 98168464 = 18446^2 + 9908^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 438423380.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (438423383) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10960565 + ... + 10960604.

It is an arithmetic number, because the mean of its divisors is an integer number (76724095).

Almost surely, 2^438423380 is an apocalyptic number.

It is an amenable number.

438423380 is an abundant number, since it is smaller than the sum of its proper divisors (482265760).

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

438423380 is a wasteful number, since it uses less digits than its factorization.

438423380 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21921178 (or 21921176 counting only the distinct ones).

The product of its (nonzero) digits is 55296, while the sum is 35.

The square root of 438423380 is about 20938.5620327662. The cubic root of 438423380 is about 759.6809487205.

The spelling of 438423380 in words is "four hundred thirty-eight million, four hundred twenty-three thousand, three hundred eighty".