1810864 has 20 divisors (see below), whose sum is σ = 3827880. Its totient is φ = 823040.

The previous prime is 1810819. The next prime is 1810867. The reversal of 1810864 is 4680181.

It is not an unprimeable number, because it can be changed into a prime (1810867) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4969 + ... + 5320.

It is an arithmetic number, because the mean of its divisors is an integer number (191394).

2^1810864 is an apocalyptic number.

It is an amenable number.

1810864 is an abundant number, since it is smaller than the sum of its proper divisors (2017016).

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

1810864 is a wasteful number, since it uses less digits than its factorization.

1810864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10308 (or 10302 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 28.

The square root of 1810864 is about 1345.6834694682. The cubic root of 1810864 is about 121.8882789827. Note that the first 3 decimals are identical.

The spelling of 1810864 in words is "one million, eight hundred ten thousand, eight hundred sixty-four".