42440310 has 96 divisors (see below), whose sum is σ = 121575168. Its totient is φ = 10186560.

The previous prime is 42440309. The next prime is 42440327. The reversal of 42440310 is 1304424.

It is a super-2 number, since 2×42440310² = 3602359825792200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 161239 + ... + 161501.

It is an arithmetic number, because the mean of its divisors is an integer number (1266408).

Almost surely, 2^42440310 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 42440310, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (60787584).

42440310 is an abundant number, since it is smaller than the sum of its proper divisors (79134858).

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

42440310 is a wasteful number, since it uses less digits than its factorization.

42440310 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 450 (or 447 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 18.

The square root of 42440310 is about 6514.6227826329. The cubic root of 42440310 is about 348.8131500089.

Adding to 42440310 its reverse (1304424), we get a palindrome (43744734).

The spelling of 42440310 in words is "forty-two million, four hundred forty thousand, three hundred ten".