1866486 has 16 divisors (see below), whose sum is σ = 3789504. Its totient is φ = 612744.

The previous prime is 1866467. The next prime is 1866499. The reversal of 1866486 is 6846681.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1920 + ... + 2723.

It is an arithmetic number, because the mean of its divisors is an integer number (236844).

2^1866486 is an apocalyptic number.

1866486 is an abundant number, since it is smaller than the sum of its proper divisors (1923018).

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

1866486 is a wasteful number, since it uses less digits than its factorization.

1866486 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4715.

The product of its digits is 55296, while the sum is 39.

The square root of 1866486 is about 1366.1939832981. The cubic root of 1866486 is about 123.1236775692.

The spelling of 1866486 in words is "one million, eight hundred sixty-six thousand, four hundred eighty-six".