42221368 has 32 divisors (see below), whose sum is σ = 91317600. Its totient is φ = 17926272.

The previous prime is 42221359. The next prime is 42221383. The reversal of 42221368 is 86312224.

It is a Harshad number since it is a multiple of its sum of digits (28).

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, 2646 + ... + 9562.

It is an arithmetic number, because the mean of its divisors is an integer number (2853675).

Almost surely, 2^42221368 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 42221368, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (45658800).

42221368 is an abundant number, since it is smaller than the sum of its proper divisors (49096232).

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

42221368 is a wasteful number, since it uses less digits than its factorization.

42221368 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7039 (or 7035 counting only the distinct ones).

The product of its digits is 4608, while the sum is 28.

The square root of 42221368 is about 6497.7971651938. The cubic root of 42221368 is about 348.2122939476.

The spelling of 42221368 in words is "forty-two million, two hundred twenty-one thousand, three hundred sixty-eight".