440421432 has 64 divisors (see below), whose sum is σ = 1206696960. Its totient is φ = 132844800.

The previous prime is 440421383. The next prime is 440421439. The reversal of 440421432 is 234124044.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (440421439) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 55132 + ... + 62612.

It is an arithmetic number, because the mean of its divisors is an integer number (18854640).

Almost surely, 2^440421432 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 440421432, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (603348480).

440421432 is an abundant number, since it is smaller than the sum of its proper divisors (766275528).

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

440421432 is a wasteful number, since it uses less digits than its factorization.

440421432 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7724 (or 7720 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 24.

The square root of 440421432 is about 20986.2200503092. The cubic root of 440421432 is about 760.8332458567.

Adding to 440421432 its reverse (234124044), we get a palindrome (674545476).

The spelling of 440421432 in words is "four hundred forty million, four hundred twenty-one thousand, four hundred thirty-two".