1866330 has 48 divisors (see below), whose sum is σ = 4928040. Its totient is φ = 489984.

The previous prime is 1866307. The next prime is 1866331. The reversal of 1866330 is 336681.

It can be written as a sum of positive squares in 4 ways, for example, as 927369 + 938961 = 963^2 + 969^2 .

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1866294 and 1866303.

It is not an unprimeable number, because it can be changed into a prime (1866331) 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, 7894 + ... + 8126.

2^1866330 is an apocalyptic number.

1866330 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 1866330, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2464020).

1866330 is an abundant number, since it is smaller than the sum of its proper divisors (3061710).

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

1866330 is a wasteful number, since it uses less digits than its factorization.

1866330 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 335 (or 332 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 27.

The square root of 1866330 is about 1366.1368891879. The cubic root of 1866330 is about 123.1202472677.

The spelling of 1866330 in words is "one million, eight hundred sixty-six thousand, three hundred thirty".