42210138 has 32 divisors (see below), whose sum is σ = 87701760. Its totient is φ = 13527360.

The previous prime is 42210137. The next prime is 42210163. The reversal of 42210138 is 83101224.

It is not an unprimeable number, because it can be changed into a prime (42210137) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 63528 + ... + 64188.

It is an arithmetic number, because the mean of its divisors is an integer number (2740680).

Almost surely, 2^42210138 is an apocalyptic number.

42210138 is an abundant number, since it is smaller than the sum of its proper divisors (45491622).

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

42210138 is a wasteful number, since it uses less digits than its factorization.

42210138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1062.

The product of its (nonzero) digits is 384, while the sum is 21.

The square root of 42210138 is about 6496.9329687169. The cubic root of 42210138 is about 348.1814188166.

The spelling of 42210138 in words is "forty-two million, two hundred ten thousand, one hundred thirty-eight".