438436316975020 has 72 divisors (see below), whose sum is σ = 1139415564649824. Its totient is φ = 138757867342848.

The previous prime is 438436316975017. The next prime is 438436316975021. The reversal of 438436316975020 is 20579613634834.

It is a self number, because there is not a number n which added to its sum of digits gives 438436316975020.

It is not an unprimeable number, because it can be changed into a prime (438436316975021) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 9265325389 + ... + 9265372708.

It is an arithmetic number, because the mean of its divisors is an integer number (15825216175692).

It is a 1-persistent number, because it is pandigital, but 2⋅438436316975020 = 876872633950040 is not.

Almost surely, 2^{438436316975020} is an apocalyptic number.

It is an amenable number.

438436316975020 is an abundant number, since it is smaller than the sum of its proper divisors (700979247674804).

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

438436316975020 is a wasteful number, since it uses less digits than its factorization.

438436316975020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18530698139 (or 18530698124 counting only the distinct ones).

The product of its (nonzero) digits is 78382080, while the sum is 61.

The spelling of 438436316975020 in words is "four hundred thirty-eight trillion, four hundred thirty-six billion, three hundred sixteen million, nine hundred seventy-five thousand, twenty".