10381866 has 64 divisors (see below), whose sum is σ = 25297920. Its totient is φ = 2799360.

The previous prime is 10381859. The next prime is 10381871. The reversal of 10381866 is 66818301.

10381866 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (33).

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, 21075 + ... + 21561.

It is an arithmetic number, because the mean of its divisors is an integer number (395280).

Almost surely, 2^10381866 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 10381866, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (12648960).

10381866 is an abundant number, since it is smaller than the sum of its proper divisors (14916054).

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

10381866 is a wasteful number, since it uses less digits than its factorization.

10381866 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 539.

The product of its (nonzero) digits is 6912, while the sum is 33.

The square root of 10381866 is about 3222.0903153078. The cubic root of 10381866 is about 218.1516353765.

The spelling of 10381866 in words is "ten million, three hundred eighty-one thousand, eight hundred sixty-six".