42072228 has 36 divisors (see below), whose sum is σ = 116018448. Its totient is φ = 12749040.

The previous prime is 42072223. The next prime is 42072253. The reversal of 42072228 is 82227024.

It is a tau number, because it is divible by the number of its divisors (36).

It is not an unprimeable number, because it can be changed into a prime (42072223) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 52726 + ... + 53517.

Almost surely, 2^42072228 is an apocalyptic number.

It is an amenable number.

42072228 is an abundant number, since it is smaller than the sum of its proper divisors (73946220).

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

42072228 is a wasteful number, since it uses less digits than its factorization.

42072228 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 106264 (or 106259 counting only the distinct ones).

The product of its (nonzero) digits is 3584, while the sum is 27.

The square root of 42072228 is about 6486.3108158644. The cubic root of 42072228 is about 347.8018094640.

The spelling of 42072228 in words is "forty-two million, seventy-two thousand, two hundred twenty-eight".