438681732 has 12 divisors (see below), whose sum is σ = 1023590736. Its totient is φ = 146227240.

The previous prime is 438681701. The next prime is 438681739. The reversal of 438681732 is 237186834.

It is a tau number, because it is divible by the number of its divisors (12).

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (438681739) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18278394 + ... + 18278417.

It is an arithmetic number, because the mean of its divisors is an integer number (85299228).

Almost surely, 2^438681732 is an apocalyptic number.

It is an amenable number.

438681732 is an abundant number, since it is smaller than the sum of its proper divisors (584909004).

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

438681732 is a wasteful number, since it uses less digits than its factorization.

438681732 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36556818 (or 36556816 counting only the distinct ones).

The product of its digits is 193536, while the sum is 42.

The square root of 438681732 is about 20944.7304112514. The cubic root of 438681732 is about 759.8301397860.

The spelling of 438681732 in words is "four hundred thirty-eight million, six hundred eighty-one thousand, seven hundred thirty-two".