421693344 has 96 divisors (see below), whose sum is σ = 1235162880. Its totient is φ = 139968000.

The previous prime is 421693343. The next prime is 421693357. The reversal of 421693344 is 443396124.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (96).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a nude number because it is divisible by every one of its digits.

It is a junction number, because it is equal to n+sod(n) for n = 421693299 and 421693308.

It is not an unprimeable number, because it can be changed into a prime (421693343) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 233244 + ... + 235044.

It is an arithmetic number, because the mean of its divisors is an integer number (12866280).

Almost surely, 2^421693344 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 421693344, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (617581440).

421693344 is an abundant number, since it is smaller than the sum of its proper divisors (813469536).

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

421693344 is a wasteful number, since it uses less digits than its factorization.

421693344 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2091 (or 2077 counting only the distinct ones).

The product of its digits is 62208, while the sum is 36.

The square root of 421693344 is about 20535.1733374715. The cubic root of 421693344 is about 749.8923365455.

The spelling of 421693344 in words is "four hundred twenty-one million, six hundred ninety-three thousand, three hundred forty-four".