438134268378 has 32 divisors (see below), whose sum is σ = 879581102400. Its totient is φ = 145493159040.

The previous prime is 438134268373. The next prime is 438134268401. The reversal of 438134268378 is 873862431834.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (438134268371) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3529038 + ... + 3651078.

It is an arithmetic number, because the mean of its divisors is an integer number (27486909450).

Almost surely, 2^438134268378 is an apocalyptic number.

438134268378 is an abundant number, since it is smaller than the sum of its proper divisors (441446834022).

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

438134268378 is a wasteful number, since it uses less digits than its factorization.

438134268378 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 124302.

The product of its digits is 18579456, while the sum is 57.

The spelling of 438134268378 in words is "four hundred thirty-eight billion, one hundred thirty-four million, two hundred sixty-eight thousand, three hundred seventy-eight".