431440403430 has 64 divisors (see below), whose sum is σ = 1081497028608. Its totient is φ = 109944658560.

The previous prime is 431440403419. The next prime is 431440403431. The reversal of 431440403430 is 34304044134.

It is a super-2 number, since 2×431440403430² (a number of 24 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (431440403431) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 437427 + ... + 1026753.

It is an arithmetic number, because the mean of its divisors is an integer number (16898391072).

Almost surely, 2^431440403430 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 431440403430, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (540748514304).

431440403430 is an abundant number, since it is smaller than the sum of its proper divisors (650056625178).

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

431440403430 is a wasteful number, since it uses less digits than its factorization.

431440403430 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 590421.

The product of its (nonzero) digits is 27648, while the sum is 30.

Adding to 431440403430 its reverse (34304044134), we get a palindrome (465744447564).

The spelling of 431440403430 in words is "four hundred thirty-one billion, four hundred forty million, four hundred three thousand, four hundred thirty".