1813860 has 48 divisors (see below), whose sum is σ = 5644800. Its totient is φ = 483552.

The previous prime is 1813853. The next prime is 1813897. The reversal of 1813860 is 683181.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1140 + ... + 2219.

It is an arithmetic number, because the mean of its divisors is an integer number (117600).

2^1813860 is an apocalyptic number.

1813860 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1813860 is an abundant number, since it is smaller than the sum of its proper divisors (3830940).

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

1813860 is a wasteful number, since it uses less digits than its factorization.

1813860 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3377 (or 3369 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 27.

The square root of 1813860 is about 1346.7961983908. The cubic root of 1813860 is about 121.9554616606.

The spelling of 1813860 in words is "one million, eight hundred thirteen thousand, eight hundred sixty".