39850866 has 120 divisors (see below), whose sum is σ = 104282640. Its totient is φ = 11333520.

The previous prime is 39850849. The next prime is 39850891. The reversal of 39850866 is 66805893.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 59 ways as a sum of consecutive naturals, for example, 372385 + ... + 372491.

It is an arithmetic number, because the mean of its divisors is an integer number (869022).

Almost surely, 2^39850866 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 39850866, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (52141320).

39850866 is an abundant number, since it is smaller than the sum of its proper divisors (64431774).

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

39850866 is a wasteful number, since it uses less digits than its factorization.

39850866 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 162 (or 142 counting only the distinct ones).

The product of its (nonzero) digits is 311040, while the sum is 45.

The square root of 39850866 is about 6312.7542325042. The cubic root of 39850866 is about 341.5696341020.

The spelling of 39850866 in words is "thirty-nine million, eight hundred fifty thousand, eight hundred sixty-six".