438217652 has 24 divisors (see below), whose sum is σ = 773190600. Its totient is φ = 217313280.

The previous prime is 438217627. The next prime is 438217667. The reversal of 438217652 is 256712834.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 156850576 + 281367076 = 12524^2 + 16774^2 .

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, 417224 + ... + 418272.

It is an arithmetic number, because the mean of its divisors is an integer number (32216275).

Almost surely, 2^438217652 is an apocalyptic number.

It is an amenable number.

438217652 is a deficient number, since it is larger than the sum of its proper divisors (334972948).

438217652 is a wasteful number, since it uses less digits than its factorization.

438217652 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1811 (or 1809 counting only the distinct ones).

The product of its digits is 80640, while the sum is 38.

The square root of 438217652 is about 20933.6487980476. The cubic root of 438217652 is about 759.5621046218.

The spelling of 438217652 in words is "four hundred thirty-eight million, two hundred seventeen thousand, six hundred fifty-two".