421434244 has 96 divisors (see below), whose sum is σ = 983549952. Its totient is φ = 153120000.

The previous prime is 421434241. The next prime is 421434253. The reversal of 421434244 is 442434124.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is not an unprimeable number, because it can be changed into a prime (421434241) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 289719 + ... + 291169.

It is an arithmetic number, because the mean of its divisors is an integer number (10245312).

Almost surely, 2^421434244 is an apocalyptic number.

421434244 is a gapful number since it is divisible by the number (44) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 421434244, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (491774976).

421434244 is an abundant number, since it is smaller than the sum of its proper divisors (562115708).

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

421434244 is a wasteful number, since it uses less digits than its factorization.

421434244 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1537 (or 1535 counting only the distinct ones).

The product of its digits is 12288, while the sum is 28.

The square root of 421434244 is about 20528.8636801943. The cubic root of 421434244 is about 749.7387202470.

Adding to 421434244 its reverse (442434124), we get a palindrome (863868368).

The spelling of 421434244 in words is "four hundred twenty-one million, four hundred thirty-four thousand, two hundred forty-four".