1918836 has 48 divisors (see below), whose sum is σ = 5051200. Its totient is φ = 629856.

The previous prime is 1918817. The next prime is 1918837. The reversal of 1918836 is 6388191.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 1918836.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1918837) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11691 + ... + 11853.

2^1918836 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 1918836, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2525600).

1918836 is an abundant number, since it is smaller than the sum of its proper divisors (3132364).

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

1918836 is a wasteful number, since it uses less digits than its factorization.

1918836 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 285 (or 277 counting only the distinct ones).

The product of its digits is 10368, while the sum is 36.

The square root of 1918836 is about 1385.2205600553. The cubic root of 1918836 is about 124.2641783647.

1918836 divided by its sum of digits (36) gives a triangular number (53301 = T₃₂₆).

The spelling of 1918836 in words is "one million, nine hundred eighteen thousand, eight hundred thirty-six".