42170228 has 6 divisors (see below), whose sum is σ = 73797906. Its totient is φ = 21085112.

The previous prime is 42170221. The next prime is 42170231. The reversal of 42170228 is 82207124.

It can be written as a sum of positive squares in only one way, i.e., 23697424 + 18472804 = 4868^2 + 4298^2 .

It is a junction number, because it is equal to n+sod(n) for n = 42170197 and 42170206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42170221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5271275 + ... + 5271282.

It is an arithmetic number, because the mean of its divisors is an integer number (12299651).

Almost surely, 2^42170228 is an apocalyptic number.

It is an amenable number.

42170228 is a deficient number, since it is larger than the sum of its proper divisors (31627678).

42170228 is a wasteful number, since it uses less digits than its factorization.

42170228 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10542561 (or 10542559 counting only the distinct ones).

The product of its (nonzero) digits is 1792, while the sum is 26.

The square root of 42170228 is about 6493.8607930876. The cubic root of 42170228 is about 348.0716481710.

The spelling of 42170228 in words is "forty-two million, one hundred seventy thousand, two hundred twenty-eight".