438636428 has 6 divisors (see below), whose sum is σ = 767613756. Its totient is φ = 219318212.

The previous prime is 438636403. The next prime is 438636463. The reversal of 438636428 is 824636834.

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 as a sum of consecutive naturals, namely, 54829550 + ... + 54829557.

It is an arithmetic number, because the mean of its divisors is an integer number (127935626).

Almost surely, 2^438636428 is an apocalyptic number.

It is an amenable number.

438636428 is a deficient number, since it is larger than the sum of its proper divisors (328977328).

438636428 is a wasteful number, since it uses less digits than its factorization.

438636428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 109659111 (or 109659109 counting only the distinct ones).

The product of its digits is 663552, while the sum is 44.

The square root of 438636428 is about 20943.6488702423. The cubic root of 438636428 is about 759.8039822271.

The spelling of 438636428 in words is "four hundred thirty-eight million, six hundred thirty-six thousand, four hundred twenty-eight".