1918648 has 8 divisors (see below), whose sum is σ = 3597480. Its totient is φ = 959320.

The previous prime is 1918643. The next prime is 1918649. The reversal of 1918648 is 8468191.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1918643) by changing a digit.

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 as a sum of consecutive naturals, namely, 119908 + ... + 119923.

It is an arithmetic number, because the mean of its divisors is an integer number (449685).

2^1918648 is an apocalyptic number.

It is an amenable number.

1918648 is a deficient number, since it is larger than the sum of its proper divisors (1678832).

1918648 is a wasteful number, since it uses less digits than its factorization.

1918648 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 239837 (or 239833 counting only the distinct ones).

The product of its digits is 13824, while the sum is 37.

The square root of 1918648 is about 1385.1526991635. The cubic root of 1918648 is about 124.2601199271.

The spelling of 1918648 in words is "one million, nine hundred eighteen thousand, six hundred forty-eight".