438244644340 has 12 divisors (see below), whose sum is σ = 920313753156. Its totient is φ = 175297857728.

The previous prime is 438244644301. The next prime is 438244644361. The reversal of 438244644340 is 43446442834.

It can be written as a sum of positive squares in 2 ways, for example, as 178213999716 + 260030644624 = 422154^2 + 509932^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10956116089 + ... + 10956116128.

It is an arithmetic number, because the mean of its divisors is an integer number (76692812763).

Almost surely, 2^438244644340 is an apocalyptic number.

It is an amenable number.

438244644340 is an abundant number, since it is smaller than the sum of its proper divisors (482069108816).

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

438244644340 is a wasteful number, since it uses less digits than its factorization.

438244644340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21912232226 (or 21912232224 counting only the distinct ones).

The product of its (nonzero) digits is 3538944, while the sum is 46.

The spelling of 438244644340 in words is "four hundred thirty-eight billion, two hundred forty-four million, six hundred forty-four thousand, three hundred forty".