438255940 has 36 divisors (see below), whose sum is σ = 939162924. Its totient is φ = 171727296.

The previous prime is 438255931. The next prime is 438255947. The reversal of 438255940 is 49552834.

It can be written as a sum of positive squares in 2 ways, for example, as 238146624 + 200109316 = 15432^2 + 14146^2 .

It is a junction number, because it is equal to n+sod(n) for n = 438255893 and 438255902.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (438255947) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 681259 + ... + 681901.

It is an arithmetic number, because the mean of its divisors is an integer number (26087859).

Almost surely, 2^438255940 is an apocalyptic number.

It is an amenable number.

438255940 is an abundant number, since it is smaller than the sum of its proper divisors (500906984).

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

438255940 is an equidigital number, since it uses as much as digits as its factorization.

438255940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1348 (or 703 counting only the distinct ones).

The product of its (nonzero) digits is 172800, while the sum is 40.

The square root of 438255940 is about 20934.5632865842. The cubic root of 438255940 is about 759.5842254916.

The spelling of 438255940 in words is "four hundred thirty-eight million, two hundred fifty-five thousand, nine hundred forty".