1906408 has 32 divisors (see below), whose sum is σ = 4161600. Its totient is φ = 801792.

The previous prime is 1906393. The next prime is 1906417. The reversal of 1906408 is 8046091.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a plaindrome in base 15.

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, 3016 + ... + 3592.

It is an arithmetic number, because the mean of its divisors is an integer number (130050).

2^1906408 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1906408, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2080800).

1906408 is an abundant number, since it is smaller than the sum of its proper divisors (2255192).

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

1906408 is a wasteful number, since it uses less digits than its factorization.

1906408 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 649 (or 645 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 28.

The square root of 1906408 is about 1380.7273445543. The cubic root of 1906408 is about 123.9953172009.

1906408 divided by its sum of digits (28) gives a palindrome (68086).

The spelling of 1906408 in words is "one million, nine hundred six thousand, four hundred eight".