1918544 has 20 divisors (see below), whose sum is σ = 3913440. Its totient is φ = 908640.

The previous prime is 1918537. The next prime is 1918549. The reversal of 1918544 is 4458191.

It is a super-2 number, since 2×1918544² = 7361622159872, which contains 22 as substring.

It is an Ulam number.

It is a self number, because there is not a number n which added to its sum of digits gives 1918544.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1918549) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2852 + ... + 3459.

It is an arithmetic number, because the mean of its divisors is an integer number (195672).

2^1918544 is an apocalyptic number.

It is an amenable number.

1918544 is an abundant number, since it is smaller than the sum of its proper divisors (1994896).

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

1918544 is a wasteful number, since it uses less digits than its factorization.

1918544 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6338 (or 6332 counting only the distinct ones).

The product of its digits is 5760, while the sum is 32.

The square root of 1918544 is about 1385.1151576674. The cubic root of 1918544 is about 124.2578747200.

The spelling of 1918544 in words is "one million, nine hundred eighteen thousand, five hundred forty-four".