422403144 has 32 divisors (see below), whose sum is σ = 1060132320. Its totient is φ = 140251136.

The previous prime is 422403127. The next prime is 422403169. The reversal of 422403144 is 441304224.

It is a happy number.

It is a super-2 number, since 2×422403144² = 356848832122169472, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 28074 + ... + 40409.

It is an arithmetic number, because the mean of its divisors is an integer number (33129135).

Almost surely, 2^422403144 is an apocalyptic number.

It is an amenable number.

422403144 is an abundant number, since it is smaller than the sum of its proper divisors (637729176).

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

422403144 is a wasteful number, since it uses less digits than its factorization.

422403144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68749 (or 68745 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 24.

The square root of 422403144 is about 20552.4486132431. The cubic root of 422403144 is about 750.3128437092.

Adding to 422403144 its reverse (441304224), we get a palindrome (863707368).

The spelling of 422403144 in words is "four hundred twenty-two million, four hundred three thousand, one hundred forty-four".