1418240 has 44 divisors (see below), whose sum is σ = 3414396. Its totient is φ = 565248.

The previous prime is 1418239. The next prime is 1418243. The reversal of 1418240 is 428141.

It can be written as a sum of positive squares in 2 ways, for example, as 369664 + 1048576 = 608^2 + 1024^2 .

It is a super-2 number, since 2×1418240² = 4022809395200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a nialpdrome in base 8.

It is not an unprimeable number, because it can be changed into a prime (1418243) 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, 4982 + ... + 5258.

2^1418240 is an apocalyptic number.

1418240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1418240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1707198).

1418240 is an abundant number, since it is smaller than the sum of its proper divisors (1996156).

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

1418240 is an equidigital number, since it uses as much as digits as its factorization.

1418240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 302 (or 284 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 20.

The square root of 1418240 is about 1190.8988202194. The cubic root of 1418240 is about 112.3526300816.

Subtracting from 1418240 its reverse (428141), we obtain a palindrome (990099).

The spelling of 1418240 in words is "one million, four hundred eighteen thousand, two hundred forty".