42199866 has 48 divisors (see below), whose sum is σ = 97913088. Its totient is φ = 13608000.

The previous prime is 42199853. The next prime is 42199879. The reversal of 42199866 is 66899124.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (42199853) and next prime (42199879).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 13666 + ... + 16466.

It is an arithmetic number, because the mean of its divisors is an integer number (2039856).

Almost surely, 2^42199866 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 42199866, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (48956544).

42199866 is an abundant number, since it is smaller than the sum of its proper divisors (55713222).

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

42199866 is a wasteful number, since it uses less digits than its factorization.

42199866 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2849 (or 2837 counting only the distinct ones).

The product of its digits is 186624, while the sum is 45.

The square root of 42199866 is about 6496.1423937595. The cubic root of 42199866 is about 348.1531727611.

The spelling of 42199866 in words is "forty-two million, one hundred ninety-nine thousand, eight hundred sixty-six".