1918764 has 18 divisors (see below), whose sum is σ = 4850300. Its totient is φ = 639576.

The previous prime is 1918747. The next prime is 1918769. The reversal of 1918764 is 4678191.

It is a tau number, because it is divible by the number of its divisors (18).

It is a Harshad number since it is a multiple of its sum of digits (36), and also a Moran number because the ratio is a prime number: 53299 = 1918764 / (1 + 9 + 1 + 8 + 7 + 6 + 4).

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (1918769) 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 in 5 ways as a sum of consecutive naturals, for example, 26614 + ... + 26685.

2^1918764 is an apocalyptic number.

It is an amenable number.

1918764 is an abundant number, since it is smaller than the sum of its proper divisors (2931536).

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

1918764 is a wasteful number, since it uses less digits than its factorization.

1918764 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53309 (or 53304 counting only the distinct ones).

The product of its digits is 12096, while the sum is 36.

The square root of 1918764 is about 1385.1945711704. The cubic root of 1918764 is about 124.2626241007.

The spelling of 1918764 in words is "one million, nine hundred eighteen thousand, seven hundred sixty-four".