438191842 has 16 divisors (see below), whose sum is σ = 717544800. Its totient is φ = 199038240.

The previous prime is 438191839. The next prime is 438191849. The reversal of 438191842 is 248191834.

It is a junction number, because it is equal to n+sod(n) for n = 438191795 and 438191804.

It is not an unprimeable number, because it can be changed into a prime (438191849) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 29209 + ... + 41587.

It is an arithmetic number, because the mean of its divisors is an integer number (44846550).

Almost surely, 2^438191842 is an apocalyptic number.

438191842 is a deficient number, since it is larger than the sum of its proper divisors (279352958).

438191842 is a wasteful number, since it uses less digits than its factorization.

438191842 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14001.

The product of its digits is 55296, while the sum is 40.

The square root of 438191842 is about 20933.0323173686. The cubic root of 438191842 is about 759.5471921821.

The spelling of 438191842 in words is "four hundred thirty-eight million, one hundred ninety-one thousand, eight hundred forty-two".