438388730208 has 144 divisors (see below), whose sum is σ = 1464617031696. Its totient is φ = 122626206720.

The previous prime is 438388730201. The next prime is 438388730303. The reversal of 438388730208 is 802037883834.

It is a tau number, because it is divible by the number of its divisors (144).

It is a super-2 number, since 2×438388730208² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (438388730201) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5281135 + ... + 5363502.

It is an arithmetic number, because the mean of its divisors is an integer number (10170951609).

Almost surely, 2^438388730208 is an apocalyptic number.

438388730208 is a gapful number since it is divisible by the number (48) formed by its first and last digit.

It is an amenable number.

438388730208 is an abundant number, since it is smaller than the sum of its proper divisors (1026228301488).

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

438388730208 is a wasteful number, since it uses less digits than its factorization.

438388730208 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10644677 (or 10644666 counting only the distinct ones).

The product of its (nonzero) digits is 6193152, while the sum is 54.

The spelling of 438388730208 in words is "four hundred thirty-eight billion, three hundred eighty-eight million, seven hundred thirty thousand, two hundred eight".