1866704 has 30 divisors (see below), whose sum is σ = 4208994. Its totient is φ = 799680.

The previous prime is 1866679. The next prime is 1866721. The reversal of 1866704 is 4076681.

1866704 is an esthetic number in base 9, because in such base its adjacent digits differ by 1.

It can be written as a sum of positive squares in only one way, i.e., 960400 + 906304 = 980^2 + 952^2 .

It is an Ulam number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 407 + ... + 1974.

2^1866704 is an apocalyptic number.

1866704 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

1866704 is an abundant number, since it is smaller than the sum of its proper divisors (2342290).

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

1866704 is a wasteful number, since it uses less digits than its factorization.

1866704 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2403 (or 2390 counting only the distinct ones).

The product of its (nonzero) digits is 8064, while the sum is 32.

The square root of 1866704 is about 1366.2737646607. The cubic root of 1866704 is about 123.1284708754.

The spelling of 1866704 in words is "one million, eight hundred sixty-six thousand, seven hundred four".