42520344 has 64 divisors (see below), whose sum is σ = 111498240. Its totient is φ = 13495680.

The previous prime is 42520337. The next prime is 42520367. The reversal of 42520344 is 44302524.

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

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 49422 + ... + 50274.

It is an arithmetic number, because the mean of its divisors is an integer number (1742160).

Almost surely, 2^42520344 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 42520344, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (55749120).

42520344 is an abundant number, since it is smaller than the sum of its proper divisors (68977896).

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

42520344 is a wasteful number, since it uses less digits than its factorization.

42520344 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 960 (or 956 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 24.

The square root of 42520344 is about 6520.7625320970. The cubic root of 42520344 is about 349.0322764434.

Adding to 42520344 its reverse (44302524), we get a palindrome (86822868).

The spelling of 42520344 in words is "forty-two million, five hundred twenty thousand, three hundred forty-four".