438213888 has 180 divisors, whose sum is σ = 1493836960. Its totient is φ = 125162496.

The previous prime is 438213859. The next prime is 438213889. The reversal of 438213888 is 888312834.

438213888 is a `hidden beast` number, since 438 + 2 + 138 + 88 = 666.

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (438213889) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 143643 + ... + 146661.

Almost surely, 2^438213888 is an apocalyptic number.

438213888 is a gapful number since it is divisible by the number (48) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 438213888, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (746918480).

438213888 is an abundant number, since it is smaller than the sum of its proper divisors (1055623072).

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

438213888 is an equidigital number, since it uses as much as digits as its factorization.

438213888 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3054 (or 3031 counting only the distinct ones).

The product of its digits is 294912, while the sum is 45.

The square root of 438213888 is about 20933.5588947508. The cubic root of 438213888 is about 759.5599299034.

The spelling of 438213888 in words is "four hundred thirty-eight million, two hundred thirteen thousand, eight hundred eighty-eight".