2381406 has 16 divisors (see below), whose sum is σ = 4828944. Its totient is φ = 782784.

The previous prime is 2381387. The next prime is 2381413. The reversal of 2381406 is 6041832.

It is a happy number.

2381406 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2281 + ... + 3156.

It is an arithmetic number, because the mean of its divisors is an integer number (301809).

2^2381406 is an apocalyptic number.

2381406 is an abundant number, since it is smaller than the sum of its proper divisors (2447538).

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

2381406 is a wasteful number, since it uses less digits than its factorization.

2381406 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5515.

The product of its (nonzero) digits is 1152, while the sum is 24.

The square root of 2381406 is about 1543.1804819917. The cubic root of 2381406 is about 133.5399311038.

The spelling of 2381406 in words is "two million, three hundred eighty-one thousand, four hundred six".