1662438 has 8 divisors (see below), whose sum is σ = 3324888. Its totient is φ = 554144.

The previous prime is 1662403. The next prime is 1662439. The reversal of 1662438 is 8342661.

It is a sphenic number, since it is the product of 3 distinct primes.

1662438 is an admirable number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1662439) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 138531 + ... + 138542.

It is an arithmetic number, because the mean of its divisors is an integer number (415611).

2^1662438 is an apocalyptic number.

1662438 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

1662438 is a wasteful number, since it uses less digits than its factorization.

1662438 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 277078.

The product of its digits is 6912, while the sum is 30.

The square root of 1662438 is about 1289.3556530298. The cubic root of 1662438 is about 118.4627524515.

The spelling of 1662438 in words is "one million, six hundred sixty-two thousand, four hundred thirty-eight".