42206228 has 12 divisors (see below), whose sum is σ = 73946292. Its totient is φ = 21078720.

The previous prime is 42206209. The next prime is 42206249. The reversal of 42206228 is 82260224.

It can be written as a sum of positive squares in 2 ways, for example, as 23990404 + 18215824 = 4898^2 + 4268^2 .

It is a junction number, because it is equal to n+sod(n) for n = 42206197 and 42206206.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1883 + ... + 9378.

It is an arithmetic number, because the mean of its divisors is an integer number (6162191).

Almost surely, 2^42206228 is an apocalyptic number.

It is an amenable number.

42206228 is a deficient number, since it is larger than the sum of its proper divisors (31740064).

42206228 is a wasteful number, since it uses less digits than its factorization.

42206228 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12202 (or 12200 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 26.

The square root of 42206228 is about 6496.6320505320. The cubic root of 42206228 is about 348.1706675970.

The spelling of 42206228 in words is "forty-two million, two hundred six thousand, two hundred twenty-eight".