438289380 has 168 divisors, whose sum is σ = 1441081152. Its totient is φ = 111710016.

The previous prime is 438289373. The next prime is 438289387. The reversal of 438289380 is 83982834.

It is an interprime number because it is at equal distance from previous prime (438289373) and next prime (438289387).

It is a Harshad number since it is a multiple of its sum of digits (45).

It is not an unprimeable number, because it can be changed into a prime (438289387) by changing a digit.

It is a polite number, since it can be written in 55 ways as a sum of consecutive naturals, for example, 334687 + ... + 335993.

It is an arithmetic number, because the mean of its divisors is an integer number (8577864).

Almost surely, 2^438289380 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 438289380, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (720540576).

438289380 is an abundant number, since it is smaller than the sum of its proper divisors (1002791772).

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

438289380 is a wasteful number, since it uses less digits than its factorization.

438289380 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1357 (or 1340 counting only the distinct ones).

The product of its (nonzero) digits is 331776, while the sum is 45.

The square root of 438289380 is about 20935.3619505372. The cubic root of 438289380 is about 759.6035443782.

The spelling of 438289380 in words is "four hundred thirty-eight million, two hundred eighty-nine thousand, three hundred eighty".