1648918 has 4 divisors (see below), whose sum is σ = 2473380. Its totient is φ = 824458.

The previous prime is 1648909. The next prime is 1648919. The reversal of 1648918 is 8198461.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 8198461 = 61 ⋅134401.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1648919) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 412228 + ... + 412231.

It is an arithmetic number, because the mean of its divisors is an integer number (618345).

2^1648918 is an apocalyptic number.

1648918 is a deficient number, since it is larger than the sum of its proper divisors (824462).

1648918 is an equidigital number, since it uses as much as digits as its factorization.

1648918 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 824461.

The product of its digits is 13824, while the sum is 37.

The square root of 1648918 is about 1284.1020208691. The cubic root of 1648918 is about 118.1407398565.

The spelling of 1648918 in words is "one million, six hundred forty-eight thousand, nine hundred eighteen".