42321444 has 36 divisors (see below), whose sum is σ = 108547152. Its totient is φ = 12824240.

The previous prime is 42321439. The next prime is 42321457. The reversal of 42321444 is 44412324.

It is a happy number.

It is a super-2 number, since 2×42321444² = 3582209244490272, which contains 22 as substring.

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

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 13122 + ... + 16025.

Almost surely, 2^42321444 is an apocalyptic number.

42321444 is a gapful number since it is divisible by the number (44) formed by its first and last digit.

It is an amenable number.

42321444 is an abundant number, since it is smaller than the sum of its proper divisors (66225708).

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

42321444 is a wasteful number, since it uses less digits than its factorization.

42321444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29176 (or 29163 counting only the distinct ones).

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

The square root of 42321444 is about 6505.4933709904. The cubic root of 42321444 is about 348.4871958008.

Adding to 42321444 its reverse (44412324), we get a palindrome (86733768).

The spelling of 42321444 in words is "forty-two million, three hundred twenty-one thousand, four hundred forty-four".