42064890 has 64 divisors (see below), whose sum is σ = 115900416. Its totient is φ = 9571392.

The previous prime is 42064889. The next prime is 42064901. The reversal of 42064890 is 9846024.

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, 80169 + ... + 80691.

It is an arithmetic number, because the mean of its divisors is an integer number (1810944).

Almost surely, 2^42064890 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 42064890, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (57950208).

42064890 is an abundant number, since it is smaller than the sum of its proper divisors (73835526).

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

42064890 is a wasteful number, since it uses less digits than its factorization.

42064890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 923.

The product of its (nonzero) digits is 13824, while the sum is 33.

The square root of 42064890 is about 6485.7451383785. The cubic root of 42064890 is about 347.7815877470.

The spelling of 42064890 in words is "forty-two million, sixty-four thousand, eight hundred ninety".