1648920 has 128 divisors (see below), whose sum is σ = 6128640. Its totient is φ = 345600.

The previous prime is 1648919. The next prime is 1648943. The reversal of 1648920 is 298461.

1648920 is nontrivially palindromic in base 9.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 10845 + ... + 10995.

It is an arithmetic number, because the mean of its divisors is an integer number (47880).

2^1648920 is an apocalyptic number.

1648920 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 1648920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3064320).

1648920 is an abundant number, since it is smaller than the sum of its proper divisors (4479720).

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

1648920 is a wasteful number, since it uses less digits than its factorization.

1648920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 185 (or 181 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 30.

The square root of 1648920 is about 1284.1027996231. The cubic root of 1648920 is about 118.1407876214.

The spelling of 1648920 in words is "one million, six hundred forty-eight thousand, nine hundred twenty".