438666860 has 24 divisors (see below), whose sum is σ = 936304656. Its totient is φ = 172589760.

The previous prime is 438666841. The next prime is 438666871. The reversal of 438666860 is 68666834.

It is a super-2 number, since 2×438666860² = 384857228124519200, which contains 22 as substring.

It is a Smith number, since the sum of its digits (47) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 178562 + ... + 181001.

It is an arithmetic number, because the mean of its divisors is an integer number (39012694).

Almost surely, 2^438666860 is an apocalyptic number.

It is an amenable number.

438666860 is an abundant number, since it is smaller than the sum of its proper divisors (497637796).

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

438666860 is a wasteful number, since it uses less digits than its factorization.

438666860 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 359633 (or 359631 counting only the distinct ones).

The product of its (nonzero) digits is 995328, while the sum is 47.

The square root of 438666860 is about 20944.3753786070. The cubic root of 438666860 is about 759.8215532104.

The spelling of 438666860 in words is "four hundred thirty-eight million, six hundred sixty-six thousand, eight hundred sixty".