438684140 has 12 divisors (see below), whose sum is σ = 921236736. Its totient is φ = 175473648.

The previous prime is 438684137. The next prime is 438684163. The reversal of 438684140 is 41486834.

It is a junction number, because it is equal to n+sod(n) for n = 438684094 and 438684103.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10967084 + ... + 10967123.

It is an arithmetic number, because the mean of its divisors is an integer number (76769728).

Almost surely, 2^438684140 is an apocalyptic number.

It is an amenable number.

438684140 is an abundant number, since it is smaller than the sum of its proper divisors (482552596).

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

438684140 is a wasteful number, since it uses less digits than its factorization.

438684140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21934216 (or 21934214 counting only the distinct ones).

The product of its (nonzero) digits is 73728, while the sum is 38.

The square root of 438684140 is about 20944.7878957988. The cubic root of 438684140 is about 759.8315300632.

The spelling of 438684140 in words is "four hundred thirty-eight million, six hundred eighty-four thousand, one hundred forty".