42489664 has 84 divisors (see below), whose sum is σ = 103980996. Its totient is φ = 17117184.

The previous prime is 42489641. The next prime is 42489677. The reversal of 42489664 is 46698424.

It can be written as a sum of positive squares in 2 ways, for example, as 27123264 + 15366400 = 5208^2 + 3920^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 42489664.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 52914 + ... + 53710.

It is an arithmetic number, because the mean of its divisors is an integer number (1237869).

Almost surely, 2^42489664 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 42489664, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (51990498).

42489664 is an abundant number, since it is smaller than the sum of its proper divisors (61491332).

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

42489664 is a wasteful number, since it uses less digits than its factorization.

42489664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 840 (or 823 counting only the distinct ones).

The product of its digits is 331776, while the sum is 43.

The square root of 42489664 is about 6518.4096219860. The cubic root of 42489664 is about 348.9483096818.

The spelling of 42489664 in words is "forty-two million, four hundred eighty-nine thousand, six hundred sixty-four".