438289685434 has 12 divisors (see below), whose sum is σ = 698382008334. Its totient is φ = 206253969344.

The previous prime is 438289685429. The next prime is 438289685443. The reversal of 438289685434 is 434586982834.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 415505292409 + 22784393025 = 644597^2 + 150945^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 379142749 + ... + 379143904.

Almost surely, 2^438289685434 is an apocalyptic number.

438289685434 is a deficient number, since it is larger than the sum of its proper divisors (260092322900).

438289685434 is a wasteful number, since it uses less digits than its factorization.

438289685434 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 758286689 (or 758286672 counting only the distinct ones).

The product of its digits is 159252480, while the sum is 64.

The spelling of 438289685434 in words is "four hundred thirty-eight billion, two hundred eighty-nine million, six hundred eighty-five thousand, four hundred thirty-four".