42440544 has 48 divisors (see below), whose sum is σ = 123787440. Its totient is φ = 14146560.

The previous prime is 42440539. The next prime is 42440557. The reversal of 42440544 is 44504424.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (48).

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a nialpdrome in base 9.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23697 + ... + 25424.

It is an arithmetic number, because the mean of its divisors is an integer number (2578905).

Almost surely, 2^42440544 is an apocalyptic number.

It is an amenable number.

42440544 is an abundant number, since it is smaller than the sum of its proper divisors (81346896).

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

42440544 is a wasteful number, since it uses less digits than its factorization.

42440544 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49140 (or 49126 counting only the distinct ones).

The product of its (nonzero) digits is 10240, while the sum is 27.

The square root of 42440544 is about 6514.6407422052. The cubic root of 42440544 is about 348.8137910828.

Adding to 42440544 its reverse (44504424), we get a palindrome (86944968).

The spelling of 42440544 in words is "forty-two million, four hundred forty thousand, five hundred forty-four".