438544646 has 16 divisors (see below), whose sum is σ = 679916976. Its totient is φ = 211981536.

The previous prime is 438544633. The next prime is 438544661. The reversal of 438544646 is 646445834.

It is a junction number, because it is equal to n+sod(n) for n = 438544597 and 438544606.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7256 + ... + 30491.

It is an arithmetic number, because the mean of its divisors is an integer number (42494811).

Almost surely, 2^438544646 is an apocalyptic number.

438544646 is a deficient number, since it is larger than the sum of its proper divisors (241372330).

438544646 is a wasteful number, since it uses less digits than its factorization.

438544646 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37943.

The product of its digits is 1105920, while the sum is 44.

The square root of 438544646 is about 20941.4575901488. The cubic root of 438544646 is about 759.7509837458.

The spelling of 438544646 in words is "four hundred thirty-eight million, five hundred forty-four thousand, six hundred forty-six".