438440888388 has 12 divisors (see below), whose sum is σ = 1023028739600. Its totient is φ = 146146962792.

The previous prime is 438440888371. The next prime is 438440888407. The reversal of 438440888388 is 883888044834.

It is a tau number, because it is divible by the number of its divisors (12).

It is a super-2 number, since 2×438440888388² (a number of 24 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18268370338 + ... + 18268370361.

Almost surely, 2^438440888388 is an apocalyptic number.

It is an amenable number.

438440888388 is an abundant number, since it is smaller than the sum of its proper divisors (584587851212).

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

438440888388 is a wasteful number, since it uses less digits than its factorization.

438440888388 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36536740706 (or 36536740704 counting only the distinct ones).

The product of its (nonzero) digits is 150994944, while the sum is 66.

The spelling of 438440888388 in words is "four hundred thirty-eight billion, four hundred forty million, eight hundred eighty-eight thousand, three hundred eighty-eight".