42190290 has 24 divisors (see below), whose sum is σ = 109694988. Its totient is φ = 11250720.

The previous prime is 42190231. The next prime is 42190307. The reversal of 42190290 is 9209124.

It can be written as a sum of positive squares in 2 ways, for example, as 41641209 + 549081 = 6453^2 + 741^2 .

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 234301 + ... + 234480.

Almost surely, 2^42190290 is an apocalyptic number.

42190290 is an abundant number, since it is smaller than the sum of its proper divisors (67504698).

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

42190290 is a wasteful number, since it uses less digits than its factorization.

42190290 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 468794 (or 468791 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 27.

The square root of 42190290 is about 6495.4052991326. The cubic root of 42190290 is about 348.1268364453.

The spelling of 42190290 in words is "forty-two million, one hundred ninety thousand, two hundred ninety".