440422020 has 144 divisors (see below), whose sum is σ = 1374347520. Its totient is φ = 114121728.

The previous prime is 440422019. The next prime is 440422049. The reversal of 440422020 is 20224044.

440422020 is a `hidden beast` number, since 440 + 4 + 220 + 2 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 440421984 and 440422002.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1199877 + ... + 1200243.

It is an arithmetic number, because the mean of its divisors is an integer number (9544080).

Almost surely, 2^440422020 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 440422020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (687173760).

440422020 is an abundant number, since it is smaller than the sum of its proper divisors (933925500).

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

440422020 is a wasteful number, since it uses less digits than its factorization.

440422020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 554 (or 549 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 18.

The square root of 440422020 is about 20986.2340594972. The cubic root of 440422020 is about 760.8335844489.

Adding to 440422020 its reverse (20224044), we get a palindrome (460646064).

The spelling of 440422020 in words is "four hundred forty million, four hundred twenty-two thousand, twenty".