1648980 has 36 divisors (see below), whose sum is σ = 5002452. Its totient is φ = 439680.

The previous prime is 1648963. The next prime is 1648987. The reversal of 1648980 is 898461.

It is a happy number.

1648980 is a `hidden beast` number, since 1 + 648 + 9 + 8 + 0 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 571536 + 1077444 = 756^2 + 1038^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1648987) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4401 + ... + 4760.

It is an arithmetic number, because the mean of its divisors is an integer number (138957).

2^1648980 is an apocalyptic number.

1648980 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1648980 is an abundant number, since it is smaller than the sum of its proper divisors (3353472).

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

1648980 is a wasteful number, since it uses less digits than its factorization.

1648980 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9176 (or 9171 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 36.

The square root of 1648980 is about 1284.1261620261. The cubic root of 1648980 is about 118.1422205515.

It can be divided in two parts, 1648 and 980, that added together give a triangular number (2628 = T₇₂).

The spelling of 1648980 in words is "one million, six hundred forty-eight thousand, nine hundred eighty".