1648490 has 16 divisors (see below), whose sum is σ = 3142152. Its totient is φ = 620544.

The previous prime is 1648483. The next prime is 1648499. The reversal of 1648490 is 948461.

It can be written as a sum of positive squares in 4 ways, for example, as 1229881 + 418609 = 1109^2 + 647^2 .

It is not an unprimeable number, because it can be changed into a prime (1648499) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4679 + ... + 5018.

2^1648490 is an apocalyptic number.

1648490 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1648490 is a deficient number, since it is larger than the sum of its proper divisors (1493662).

1648490 is a wasteful number, since it uses less digits than its factorization.

1648490 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9721.

The product of its (nonzero) digits is 6912, while the sum is 32.

The square root of 1648490 is about 1283.9353566282. The cubic root of 1648490 is about 118.1305172717.

The spelling of 1648490 in words is "one million, six hundred forty-eight thousand, four hundred ninety".