42189290 has 64 divisors (see below), whose sum is σ = 90260352. Its totient is φ = 13996800.

The previous prime is 42189289. The next prime is 42189313. The reversal of 42189290 is 9298124.

It is a super-3 number, since 3×42189290³ (a number of 24 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 42189290.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 233000 + ... + 233180.

It is an arithmetic number, because the mean of its divisors is an integer number (1410318).

Almost surely, 2^42189290 is an apocalyptic number.

42189290 is an abundant number, since it is smaller than the sum of its proper divisors (48071062).

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

42189290 is a wasteful number, since it uses less digits than its factorization.

42189290 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 375.

The product of its (nonzero) digits is 10368, while the sum is 35.

The square root of 42189290 is about 6495.3283211859. The cubic root of 42189290 is about 348.1240859737.

The spelling of 42189290 in words is "forty-two million, one hundred eighty-nine thousand, two hundred ninety".