1648140 has 48 divisors (see below), whose sum is σ = 4972128. Its totient is φ = 405504.

The previous prime is 1648081. The next prime is 1648181. The reversal of 1648140 is 418461.

It is a self number, because there is not a number n which added to its sum of digits gives 1648140.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 277 + ... + 1836.

It is an arithmetic number, because the mean of its divisors is an integer number (103586).

2^1648140 is an apocalyptic number.

1648140 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 1648140, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2486064).

1648140 is an abundant number, since it is smaller than the sum of its proper divisors (3323988).

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

1648140 is a wasteful number, since it uses less digits than its factorization.

1648140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2138 (or 2136 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 24.

The square root of 1648140 is about 1283.7990496959. The cubic root of 1648140 is about 118.1221563661.

The spelling of 1648140 in words is "one million, six hundred forty-eight thousand, one hundred forty".