438544340 has 48 divisors (see below), whose sum is σ = 994199808. Its totient is φ = 161529984.

The previous prime is 438544303. The next prime is 438544343. The reversal of 438544340 is 43445834.

It is a super-2 number, since 2×438544340² = 384642276292071200, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 438544340.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (438544343) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 118559 + ... + 122201.

It is an arithmetic number, because the mean of its divisors is an integer number (20712496).

Almost surely, 2^438544340 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 438544340, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (497099904).

438544340 is an abundant number, since it is smaller than the sum of its proper divisors (555655468).

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

438544340 is a wasteful number, since it uses less digits than its factorization.

438544340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4128 (or 4126 counting only the distinct ones).

The product of its (nonzero) digits is 92160, while the sum is 35.

The square root of 438544340 is about 20941.4502840658. The cubic root of 438544340 is about 759.7508070372.

The spelling of 438544340 in words is "four hundred thirty-eight million, five hundred forty-four thousand, three hundred forty".