431645232228 has 144 divisors (see below), whose sum is σ = 1194603165504. Its totient is φ = 120919599360.

The previous prime is 431645232203. The next prime is 431645232229. The reversal of 431645232228 is 822232546134.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a self number, because there is not a number n which added to its sum of digits gives 431645232228.

It is not an unprimeable number, because it can be changed into a prime (431645232229) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 11351175 + ... + 11389137.

It is an arithmetic number, because the mean of its divisors is an integer number (8295855316).

Almost surely, 2^431645232228 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 431645232228, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (597301582752).

431645232228 is an abundant number, since it is smaller than the sum of its proper divisors (762957933276).

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

431645232228 is a wasteful number, since it uses less digits than its factorization.

431645232228 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38362 (or 38353 counting only the distinct ones).

The product of its digits is 552960, while the sum is 42.

The spelling of 431645232228 in words is "four hundred thirty-one billion, six hundred forty-five million, two hundred thirty-two thousand, two hundred twenty-eight".