1670440 has 16 divisors (see below), whose sum is σ = 3758580. Its totient is φ = 668160.

The previous prime is 1670419. The next prime is 1670447. The reversal of 1670440 is 440761.

It can be written as a sum of positive squares in 2 ways, for example, as 1340964 + 329476 = 1158^2 + 574^2 .

It is not an unprimeable number, because it can be changed into a prime (1670447) 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 3 ways as a sum of consecutive naturals, for example, 20841 + ... + 20920.

2^1670440 is an apocalyptic number.

1670440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1670440 is an abundant number, since it is smaller than the sum of its proper divisors (2088140).

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

1670440 is a wasteful number, since it uses less digits than its factorization.

1670440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41772 (or 41768 counting only the distinct ones).

The product of its (nonzero) digits is 672, while the sum is 22.

The square root of 1670440 is about 1292.4550282312. The cubic root of 1670440 is about 118.6525183373.

The spelling of 1670440 in words is "one million, six hundred seventy thousand, four hundred forty".