438561992 has 16 divisors (see below), whose sum is σ = 897058800. Its totient is φ = 199346320.

The previous prime is 438561989. The next prime is 438561997. The reversal of 438561992 is 299165834.

It is not an unprimeable number, because it can be changed into a prime (438561997) 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, 2491742 + ... + 2491917.

It is an arithmetic number, because the mean of its divisors is an integer number (56066175).

Almost surely, 2^438561992 is an apocalyptic number.

It is an amenable number.

438561992 is an abundant number, since it is smaller than the sum of its proper divisors (458496808).

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

438561992 is a wasteful number, since it uses less digits than its factorization.

438561992 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4983676 (or 4983672 counting only the distinct ones).

The product of its digits is 466560, while the sum is 47.

The square root of 438561992 is about 20941.8717406062. The cubic root of 438561992 is about 759.7610005646.

The spelling of 438561992 in words is "four hundred thirty-eight million, five hundred sixty-one thousand, nine hundred ninety-two".