431332138986 has 128 divisors (see below), whose sum is σ = 1068845760000. Its totient is φ = 115771686912.

The previous prime is 431332138981. The next prime is 431332139027. The reversal of 431332138986 is 689831233134.

It is a super-2 number, since 2×431332138986² (a number of 24 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (431332138981) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 2110570 + ... + 2305898.

It is an arithmetic number, because the mean of its divisors is an integer number (8350357500).

Almost surely, 2^431332138986 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 431332138986, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (534422880000).

431332138986 is an abundant number, since it is smaller than the sum of its proper divisors (637513621014).

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

431332138986 is a wasteful number, since it uses less digits than its factorization.

431332138986 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 195421 (or 195407 counting only the distinct ones).

The product of its digits is 2239488, while the sum is 51.

The spelling of 431332138986 in words is "four hundred thirty-one billion, three hundred thirty-two million, one hundred thirty-eight thousand, nine hundred eighty-six".