1670886 has 48 divisors (see below), whose sum is σ = 4212000. Its totient is φ = 468864.

The previous prime is 1670863. The next prime is 1670887. The reversal of 1670886 is 6880761.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 1670886.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1670887) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 11140 + ... + 11288.

It is an arithmetic number, because the mean of its divisors is an integer number (87750).

2^1670886 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1670886, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2106000).

1670886 is an abundant number, since it is smaller than the sum of its proper divisors (2541114).

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

1670886 is a wasteful number, since it uses less digits than its factorization.

1670886 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 253 (or 250 counting only the distinct ones).

The product of its (nonzero) digits is 16128, while the sum is 36.

The square root of 1670886 is about 1292.6275565684. The cubic root of 1670886 is about 118.6630772947.

It can be divided in two parts, 1670 and 886, that added together give a triangular number (2556 = T₇₁).

The spelling of 1670886 in words is "one million, six hundred seventy thousand, eight hundred eighty-six".