1648020 has 72 divisors (see below), whose sum is σ = 5094432. Its totient is φ = 397760.

The previous prime is 1648001. The next prime is 1648021. The reversal of 1648020 is 208461.

1648020 is a nontrivial binomial coefficient, being equal to C(1816, 2).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1648021) 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, 7147 + ... + 7373.

It is an arithmetic number, because the mean of its divisors is an integer number (70756).

2^1648020 is an apocalyptic number.

1648020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1648020 is the 1815-th triangular number and also the 908-th hexagonal number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1648020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2547216).

1648020 is an abundant number, since it is smaller than the sum of its proper divisors (3446412).

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

1648020 is a wasteful number, since it uses less digits than its factorization.

1648020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 261 (or 248 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 21.

The square root of 1648020 is about 1283.7523125588. The cubic root of 1648020 is about 118.1192894975.

The spelling of 1648020 in words is "one million, six hundred forty-eight thousand, twenty".