438774136 has 8 divisors (see below), whose sum is σ = 822701520. Its totient is φ = 219387064.

The previous prime is 438774079. The next prime is 438774143. The reversal of 438774136 is 631477834.

It is a tau number, because it is divible by the number of its divisors (8).

It is a junction number, because it is equal to n+sod(n) for n = 438774092 and 438774101.

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, 27423376 + ... + 27423391.

It is an arithmetic number, because the mean of its divisors is an integer number (102837690).

Almost surely, 2^438774136 is an apocalyptic number.

It is an amenable number.

438774136 is a deficient number, since it is larger than the sum of its proper divisors (383927384).

438774136 is a wasteful number, since it uses less digits than its factorization.

438774136 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54846773 (or 54846769 counting only the distinct ones).

The product of its digits is 338688, while the sum is 43.

The square root of 438774136 is about 20946.9361960168. The cubic root of 438774136 is about 759.8834862936.

The spelling of 438774136 in words is "four hundred thirty-eight million, seven hundred seventy-four thousand, one hundred thirty-six".