42489972 has 72 divisors (see below), whose sum is σ = 124016256. Its totient is φ = 12014784.

The previous prime is 42489943. The next prime is 42489983. The reversal of 42489972 is 27998424.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 25138 + ... + 26774.

It is an arithmetic number, because the mean of its divisors is an integer number (1722448).

Almost surely, 2^42489972 is an apocalyptic number.

42489972 is a gapful number since it is divisible by the number (42) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 42489972, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (62008128).

42489972 is an abundant number, since it is smaller than the sum of its proper divisors (81526284).

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

42489972 is a wasteful number, since it uses less digits than its factorization.

42489972 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1757 (or 1752 counting only the distinct ones).

The product of its digits is 290304, while the sum is 45.

The square root of 42489972 is about 6518.4332473379. The cubic root of 42489972 is about 348.9491528345.

The spelling of 42489972 in words is "forty-two million, four hundred eighty-nine thousand, nine hundred seventy-two".