421810044 has 48 divisors (see below), whose sum is σ = 998866176. Its totient is φ = 138528000.

The previous prime is 421810033. The next prime is 421810049. The reversal of 421810044 is 440018124.

It is a junction number, because it is equal to n+sod(n) for n = 421809996 and 421810023.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (421810049) 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, 236484 + ... + 238260.

It is an arithmetic number, because the mean of its divisors is an integer number (20809712).

Almost surely, 2^421810044 is an apocalyptic number.

It is an amenable number.

421810044 is an abundant number, since it is smaller than the sum of its proper divisors (577056132).

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

421810044 is a wasteful number, since it uses less digits than its factorization.

421810044 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2066 (or 2064 counting only the distinct ones).

The product of its (nonzero) digits is 1024, while the sum is 24.

The square root of 421810044 is about 20538.0146070646. The cubic root of 421810044 is about 749.9615055798.

Adding to 421810044 its reverse (440018124), we get a palindrome (861828168).

The spelling of 421810044 in words is "four hundred twenty-one million, eight hundred ten thousand, forty-four".