42989544 has 72 divisors (see below), whose sum is σ = 126110790. Its totient is φ = 13223808.

The previous prime is 42989489. The next prime is 42989587. The reversal of 42989544 is 44598924.

42989544 is a `hidden beast` number, since 4 + 29 + 89 + 544 = 666.

It can be written as a sum of positive squares in 3 ways, for example, as 28836900 + 14152644 = 5370^2 + 3762^2 .

It is a tau number, because it is divible by the number of its divisors (72).

It is a super-3 number, since 3×42989544³ (a number of 24 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 42989544.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 10402 + ... + 13934.

Almost surely, 2^42989544 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 42989544, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (63055395).

42989544 is an abundant number, since it is smaller than the sum of its proper divisors (83121246).

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

42989544 is a wasteful number, since it uses less digits than its factorization.

42989544 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3571 (or 3551 counting only the distinct ones).

The product of its digits is 414720, while the sum is 45.

The square root of 42989544 is about 6556.6412133043. The cubic root of 42989544 is about 350.3114072017.

The spelling of 42989544 in words is "forty-two million, nine hundred eighty-nine thousand, five hundred forty-four".