1918488 has 96 divisors (see below), whose sum is σ = 5797440. Its totient is φ = 524160.

The previous prime is 1918471. The next prime is 1918489. The reversal of 1918488 is 8848191.

It is a happy number.

It is a super-2 number, since 2×1918488² = 7361192412288, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (39).

Its product of digits (18432) is a multiple of the sum of its prime divisors (72).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1918489) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 44595 + ... + 44637.

It is an arithmetic number, because the mean of its divisors is an integer number (60390).

2^1918488 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 1918488, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2898720).

1918488 is an abundant number, since it is smaller than the sum of its proper divisors (3878952).

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

1918488 is a wasteful number, since it uses less digits than its factorization.

1918488 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 89 (or 72 counting only the distinct ones).

The product of its digits is 18432, while the sum is 39.

The square root of 1918488 is about 1385.0949425942. The cubic root of 1918488 is about 124.2566657288.

The spelling of 1918488 in words is "one million, nine hundred eighteen thousand, four hundred eighty-eight".