438974139840 has 56 divisors (see below), whose sum is σ = 1393742897040. Its totient is φ = 117059770368.

The previous prime is 438974139833. The next prime is 438974139853. The reversal of 438974139840 is 48931479834.

It is a Harshad number since it is a multiple of its sum of digits (60).

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 7 ways as a sum of consecutive naturals, for example, 228631405 + ... + 228633324.

Almost surely, 2^438974139840 is an apocalyptic number.

438974139840 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

438974139840 is an abundant number, since it is smaller than the sum of its proper divisors (954768757200).

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

438974139840 is a wasteful number, since it uses less digits than its factorization.

438974139840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 457264749 (or 457264739 counting only the distinct ones).

The product of its (nonzero) digits is 20901888, while the sum is 60.

The spelling of 438974139840 in words is "four hundred thirty-eight billion, nine hundred seventy-four million, one hundred thirty-nine thousand, eight hundred forty".