438223842 has 24 divisors (see below), whose sum is σ = 1085126016. Its totient is φ = 125206776.

The previous prime is 438223813. The next prime is 438223859. The reversal of 438223842 is 248322834.

It is a happy number.

438223842 is a `hidden beast` number, since 4 + 382 + 238 + 42 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 438223797 and 438223806.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1738858 + ... + 1739109.

It is an arithmetic number, because the mean of its divisors is an integer number (45213584).

Almost surely, 2^438223842 is an apocalyptic number.

438223842 is a gapful number since it is divisible by the number (42) formed by its first and last digit.

438223842 is an abundant number, since it is smaller than the sum of its proper divisors (646902174).

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

438223842 is a wasteful number, since it uses less digits than its factorization.

438223842 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3477982 (or 3477979 counting only the distinct ones).

The product of its digits is 73728, while the sum is 36.

The square root of 438223842 is about 20933.7966456159. The cubic root of 438223842 is about 759.5656809780.

It can be divided in two parts, 4382238 and 42, that added together give a triangular number (4382280 = T₂₉₆₀).

The spelling of 438223842 in words is "four hundred thirty-eight million, two hundred twenty-three thousand, eight hundred forty-two".