42403444 has 12 divisors (see below), whose sum is σ = 77432544. Its totient is φ = 20279864.

The previous prime is 42403441. The next prime is 42403469. The reversal of 42403444 is 44430424.

It is a super-2 number, since 2×42403444² = 3596104126122272, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42403441) 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 3 ways as a sum of consecutive naturals, for example, 230362 + ... + 230545.

It is an arithmetic number, because the mean of its divisors is an integer number (6452712).

Almost surely, 2^42403444 is an apocalyptic number.

It is an amenable number.

42403444 is a deficient number, since it is larger than the sum of its proper divisors (35029100).

42403444 is a wasteful number, since it uses less digits than its factorization.

42403444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 460934 (or 460932 counting only the distinct ones).

The product of its (nonzero) digits is 6144, while the sum is 25.

The square root of 42403444 is about 6511.7926871177. The cubic root of 42403444 is about 348.7121212870.

Adding to 42403444 its reverse (44430424), we get a palindrome (86833868).

The spelling of 42403444 in words is "forty-two million, four hundred three thousand, four hundred forty-four".