1640480 has 24 divisors (see below), whose sum is σ = 3876012. Its totient is φ = 656128.

The previous prime is 1640467. The next prime is 1640497. The reversal of 1640480 is 840461.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 1507984 + 132496 = 1228^2 + 364^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4967 + ... + 5286.

2^1640480 is an apocalyptic number.

1640480 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1640480 is an abundant number, since it is smaller than the sum of its proper divisors (2235532).

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

1640480 is a wasteful number, since it uses less digits than its factorization.

1640480 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10268 (or 10260 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 23.

The square root of 1640480 is about 1280.8122422900. The cubic root of 1640480 is about 117.9388747865.

The spelling of 1640480 in words is "one million, six hundred forty thousand, four hundred eighty".