42920228 has 12 divisors (see below), whose sum is σ = 80888220. Its totient is φ = 19809312.

The previous prime is 42920209. The next prime is 42920263. The reversal of 42920228 is 82202924.

It can be written as a sum of positive squares in 2 ways, for example, as 12802084 + 30118144 = 3578^2 + 5488^2 .

It is a plaindrome in base 11.

It is a self number, because there is not a number n which added to its sum of digits gives 42920228.

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, 412643 + ... + 412746.

It is an arithmetic number, because the mean of its divisors is an integer number (6740685).

Almost surely, 2^42920228 is an apocalyptic number.

It is an amenable number.

42920228 is a deficient number, since it is larger than the sum of its proper divisors (37967992).

42920228 is a wasteful number, since it uses less digits than its factorization.

42920228 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 825406 (or 825404 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 29.

The square root of 42920228 is about 6551.3531426721. The cubic root of 42920228 is about 350.1230261386.

The spelling of 42920228 in words is "forty-two million, nine hundred twenty thousand, two hundred twenty-eight".