438246656 has 18 divisors (see below), whose sum is σ = 874781922. Its totient is φ = 219123200.

The previous prime is 438246649. The next prime is 438246673. The reversal of 438246656 is 656642834.

It can be written as a sum of positive squares in only one way, i.e., 309197056 + 129049600 = 17584^2 + 11360^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 855695 + ... + 856206.

Almost surely, 2^438246656 is an apocalyptic number.

It is an amenable number.

438246656 is a deficient number, since it is larger than the sum of its proper divisors (436535266).

438246656 is an equidigital number, since it uses as much as digits as its factorization.

438246656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1711917 (or 1711903 counting only the distinct ones).

The product of its digits is 829440, while the sum is 44.

The square root of 438246656 is about 20934.3415468459. The cubic root of 438246656 is about 759.5788617843.

The spelling of 438246656 in words is "four hundred thirty-eight million, two hundred forty-six thousand, six hundred fifty-six".