42173888 has 56 divisors (see below), whose sum is σ = 89489280. Its totient is φ = 19676160.

The previous prime is 42173861. The next prime is 42173893. The reversal of 42173888 is 88837124.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 57170 + ... + 57902.

Almost surely, 2^42173888 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 42173888, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (44744640).

42173888 is an abundant number, since it is smaller than the sum of its proper divisors (47315392).

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

42173888 is a wasteful number, since it uses less digits than its factorization.

42173888 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 805 (or 795 counting only the distinct ones).

The product of its digits is 86016, while the sum is 41.

The square root of 42173888 is about 6494.1425915974. The cubic root of 42173888 is about 348.0817177188.

The spelling of 42173888 in words is "forty-two million, one hundred seventy-three thousand, eight hundred eighty-eight".