42518644 has 24 divisors (see below), whose sum is σ = 86849280. Its totient is φ = 17834016.

The previous prime is 42518633. The next prime is 42518657. The reversal of 42518644 is 44681524.

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, 14839 + ... + 17470.

It is an arithmetic number, because the mean of its divisors is an integer number (3618720).

Almost surely, 2^42518644 is an apocalyptic number.

It is an amenable number.

42518644 is an abundant number, since it is smaller than the sum of its proper divisors (44330636).

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

42518644 is a wasteful number, since it uses less digits than its factorization.

42518644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32367 (or 32365 counting only the distinct ones).

The product of its digits is 30720, while the sum is 34.

The square root of 42518644 is about 6520.6321779410. The cubic root of 42518644 is about 349.0276248443.

The spelling of 42518644 in words is "forty-two million, five hundred eighteen thousand, six hundred forty-four".