42444340 has 24 divisors (see below), whose sum is σ = 89460000. Its totient is φ = 16915488.

The previous prime is 42444331. The next prime is 42444377. The reversal of 42444340 is 4344424.

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, 1911 + ... + 9409.

It is an arithmetic number, because the mean of its divisors is an integer number (3727500).

Almost surely, 2^42444340 is an apocalyptic number.

It is an amenable number.

42444340 is an abundant number, since it is smaller than the sum of its proper divisors (47015660).

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

42444340 is a wasteful number, since it uses less digits than its factorization.

42444340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7791 (or 7789 counting only the distinct ones).

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

The square root of 42444340 is about 6514.9320794618. The cubic root of 42444340 is about 348.8241903972.

Adding to 42444340 its reverse (4344424), we get a palindrome (46788764).

The spelling of 42444340 in words is "forty-two million, four hundred forty-four thousand, three hundred forty".