403144420 has 48 divisors (see below), whose sum is σ = 974655360. Its totient is φ = 137205504.

The previous prime is 403144397. The next prime is 403144421. The reversal of 403144420 is 24441304.

It is a junction number, because it is equal to n+sod(n) for n = 403144391 and 403144400.

It is not an unprimeable number, because it can be changed into a prime (403144421) 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, 8671 + ... + 29689.

It is an arithmetic number, because the mean of its divisors is an integer number (20305320).

Almost surely, 2^403144420 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 403144420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (487327680).

403144420 is an abundant number, since it is smaller than the sum of its proper divisors (571510940).

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

403144420 is a wasteful number, since it uses less digits than its factorization.

403144420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21172 (or 21170 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 22.

The square root of 403144420 is about 20078.4566139930. The cubic root of 403144420 is about 738.7319530102.

Adding to 403144420 its reverse (24441304), we get a palindrome (427585724).

The spelling of 403144420 in words is "four hundred three million, one hundred forty-four thousand, four hundred twenty".