438138716970 has 64 divisors (see below), whose sum is σ = 1077299274240. Its totient is φ = 113974694400.

The previous prime is 438138716927. The next prime is 438138717043. The reversal of 438138716970 is 79617831834.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 438138716970.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 17242975 + ... + 17268365.

It is an arithmetic number, because the mean of its divisors is an integer number (16832801160).

Almost surely, 2^438138716970 is an apocalyptic number.

438138716970 is an abundant number, since it is smaller than the sum of its proper divisors (639160557270).

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

438138716970 is a wasteful number, since it uses less digits than its factorization.

438138716970 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39471.

The product of its (nonzero) digits is 6096384, while the sum is 57.

The spelling of 438138716970 in words is "four hundred thirty-eight billion, one hundred thirty-eight million, seven hundred sixteen thousand, nine hundred seventy".