438897438 has 48 divisors (see below), whose sum is σ = 1096798560. Its totient is φ = 124244928.

The previous prime is 438897413. The next prime is 438897451. The reversal of 438897438 is 834798834.

438897438 is a `hidden beast` number, since 43 + 88 + 97 + 438 = 666.

It is a super-2 number, since 2×438897438² = 385261922165927688, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2245 + ... + 29712.

It is an arithmetic number, because the mean of its divisors is an integer number (22849970).

Almost surely, 2^438897438 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 438897438, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (548399280).

438897438 is an abundant number, since it is smaller than the sum of its proper divisors (657901122).

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

438897438 is a wasteful number, since it uses less digits than its factorization.

438897438 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32081 (or 32078 counting only the distinct ones).

The product of its digits is 4644864, while the sum is 54.

The square root of 438897438 is about 20949.8791881958. The cubic root of 438897438 is about 759.9546591141.

The spelling of 438897438 in words is "four hundred thirty-eight million, eight hundred ninety-seven thousand, four hundred thirty-eight".