42889664 has 28 divisors (see below), whose sum is σ = 88812624. Its totient is φ = 20511744.

The previous prime is 42889663. The next prime is 42889673. The reversal of 42889664 is 46698824.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42889663) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 13097 + ... + 16040.

Almost surely, 2^42889664 is an apocalyptic number.

It is an amenable number.

42889664 is an abundant number, since it is smaller than the sum of its proper divisors (45922960).

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

42889664 is a wasteful number, since it uses less digits than its factorization.

42889664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29172 (or 29162 counting only the distinct ones).

The product of its digits is 663552, while the sum is 47.

The square root of 42889664 is about 6549.0200793707. The cubic root of 42889664 is about 350.0398974926.

The spelling of 42889664 in words is "forty-two million, eight hundred eighty-nine thousand, six hundred sixty-four".