42489912 has 64 divisors (see below), whose sum is σ = 111081600. Its totient is φ = 13530240.

The previous prime is 42489911. The next prime is 42489917. The reversal of 42489912 is 21998424.

It is a hoax number, since the sum of its digits (39) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42489911) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 51987 + ... + 52797.

It is an arithmetic number, because the mean of its divisors is an integer number (1735650).

Almost surely, 2^42489912 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 42489912, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (55540800).

42489912 is an abundant number, since it is smaller than the sum of its proper divisors (68591688).

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

42489912 is a wasteful number, since it uses less digits than its factorization.

42489912 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 916 (or 912 counting only the distinct ones).

The product of its digits is 41472, while the sum is 39.

The square root of 42489912 is about 6518.4286450033. The cubic root of 42489912 is about 348.9489885843.

The spelling of 42489912 in words is "forty-two million, four hundred eighty-nine thousand, nine hundred twelve".