42178224 has 160 divisors (see below), whose sum is σ = 130277376. Its totient is φ = 11612160.

The previous prime is 42178211. The next prime is 42178243. The reversal of 42178224 is 42287124.

It is a junction number, because it is equal to n+sod(n) for n = 42178191 and 42178200.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 332049 + ... + 332175.

Almost surely, 2^42178224 is an apocalyptic number.

42178224 is a gapful number since it is divisible by the number (44) 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 42178224, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (65138688).

42178224 is an abundant number, since it is smaller than the sum of its proper divisors (88099152).

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

42178224 is a wasteful number, since it uses less digits than its factorization.

42178224 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 203 (or 197 counting only the distinct ones).

The product of its digits is 7168, while the sum is 30.

The square root of 42178224 is about 6494.4764223146. The cubic root of 42178224 is about 348.0936463527.

Subtracting 42178224 from its reverse (42287124), we obtain a square (108900 = 330²).

The spelling of 42178224 in words is "forty-two million, one hundred seventy-eight thousand, two hundred twenty-four".