1866480 has 160 divisors (see below), whose sum is σ = 7285248. Its totient is φ = 384000.

The previous prime is 1866467. The next prime is 1866499. The reversal of 1866480 is 846681.

1866480 = T₄₇₅ + T₄₇₆ + ... + T₄₉₀.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 18430 + ... + 18530.

2^1866480 is an apocalyptic number.

1866480 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1866480, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3642624).

1866480 is an abundant number, since it is smaller than the sum of its proper divisors (5418768).

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

1866480 is a wasteful number, since it uses less digits than its factorization.

1866480 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 135 (or 129 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 33.

The square root of 1866480 is about 1366.1917874149. The cubic root of 1866480 is about 123.1235456380.

It can be divided in two parts, 1866 and 480, that added together give a triangular number (2346 = T₆₈).

The spelling of 1866480 in words is "one million, eight hundred sixty-six thousand, four hundred eighty".