438023646 has 32 divisors (see below), whose sum is σ = 984333600. Its totient is φ = 144365760.

The previous prime is 438023639. The next prime is 438023657. The reversal of 438023646 is 646320834.

It is a happy number.

438023646 is a `hidden beast` number, since 4 + 3 + 8 + 0 + 2 + 3 + 646 = 666.

It is a self number, because there is not a number n which added to its sum of digits gives 438023646.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 40765 + ... + 50376.

It is an arithmetic number, because the mean of its divisors is an integer number (30760425).

Almost surely, 2^438023646 is an apocalyptic number.

438023646 is an abundant number, since it is smaller than the sum of its proper divisors (546309954).

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

438023646 is a wasteful number, since it uses less digits than its factorization.

438023646 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 91241 (or 91235 counting only the distinct ones).

The product of its (nonzero) digits is 82944, while the sum is 36.

The square root of 438023646 is about 20929.0144536239. The cubic root of 438023646 is about 759.4499979578.

The spelling of 438023646 in words is "four hundred thirty-eight million, twenty-three thousand, six hundred forty-six".