42790237 has 12 divisors (see below), whose sum is σ = 49421280. Its totient is φ = 36292536.

The previous prime is 42790213. The next prime is 42790247. The reversal of 42790237 is 73209724.

It is a de Polignac number, because none of the positive numbers 2^k-42790237 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42790247) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 112714 + ... + 113092.

It is an arithmetic number, because the mean of its divisors is an integer number (4118440).

Almost surely, 2^42790237 is an apocalyptic number.

It is an amenable number.

42790237 is a deficient number, since it is larger than the sum of its proper divisors (6631043).

42790237 is an equidigital number, since it uses as much as digits as its factorization.

42790237 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 640 (or 513 counting only the distinct ones).

The product of its (nonzero) digits is 21168, while the sum is 34.

The square root of 42790237 is about 6541.4246919154. The cubic root of 42790237 is about 349.7692002186.

The spelling of 42790237 in words is "forty-two million, seven hundred ninety thousand, two hundred thirty-seven".