42235890 has 64 divisors (see below), whose sum is σ = 107395200. Its totient is φ = 10612224.

The previous prime is 42235819. The next prime is 42235901. The reversal of 42235890 is 9853224.

It is a happy number.

It is a Curzon number.

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, 36846 + ... + 37974.

It is an arithmetic number, because the mean of its divisors is an integer number (1678050).

Almost surely, 2^42235890 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 42235890, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (53697600).

42235890 is an abundant number, since it is smaller than the sum of its proper divisors (65159310).

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

42235890 is a wasteful number, since it uses less digits than its factorization.

42235890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1211.

The product of its (nonzero) digits is 17280, while the sum is 33.

The square root of 42235890 is about 6498.9145247495. The cubic root of 42235890 is about 348.2522118022.

The spelling of 42235890 in words is "forty-two million, two hundred thirty-five thousand, eight hundred ninety".