1818730 has 8 divisors (see below), whose sum is σ = 3273732. Its totient is φ = 727488.

The previous prime is 1818727. The next prime is 1818743. The reversal of 1818730 is 378181.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 1798281 + 20449 = 1341^2 + 143^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 90927 + ... + 90946.

2^1818730 is an apocalyptic number.

1818730 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1818730 is a deficient number, since it is larger than the sum of its proper divisors (1455002).

1818730 is a wasteful number, since it uses less digits than its factorization.

1818730 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 181880.

The product of its (nonzero) digits is 1344, while the sum is 28.

The square root of 1818730 is about 1348.6029808658. The cubic root of 1818730 is about 122.0645094650.

It can be divided in two parts, 181 and 8730, that added together give a triangular number (8911 = T₁₃₃).

The spelling of 1818730 in words is "one million, eight hundred eighteen thousand, seven hundred thirty".