438149166 has 32 divisors (see below), whose sum is σ = 1078522368. Its totient is φ = 115555680.

The previous prime is 438149161. The next prime is 438149167. The reversal of 438149166 is 661941834.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (438149161) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 400690 + ... + 401781.

It is an arithmetic number, because the mean of its divisors is an integer number (33703824).

Almost surely, 2^438149166 is an apocalyptic number.

438149166 is an abundant number, since it is smaller than the sum of its proper divisors (640373202).

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

438149166 is a wasteful number, since it uses less digits than its factorization.

438149166 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 802496.

The product of its digits is 124416, while the sum is 42.

The square root of 438149166 is about 20932.0129466805. The cubic root of 438149166 is about 759.5225336611.

The spelling of 438149166 in words is "four hundred thirty-eight million, one hundred forty-nine thousand, one hundred sixty-six".