1816560 has 120 divisors (see below), whose sum is σ = 6480240. Its totient is φ = 467712.

The previous prime is 1816559. The next prime is 1816567. The reversal of 1816560 is 656181.

1816560 is a `hidden beast` number, since 1 + 8 + 1 + 656 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (120).

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1816567) 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, 62626 + ... + 62654.

It is an arithmetic number, because the mean of its divisors is an integer number (54002).

2^1816560 is an apocalyptic number.

1816560 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 1816560, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3240120).

1816560 is an abundant number, since it is smaller than the sum of its proper divisors (4663680).

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

1816560 is a wasteful number, since it uses less digits than its factorization.

1816560 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80 (or 39 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 27.

The square root of 1816560 is about 1347.7982044802. The cubic root of 1816560 is about 122.0159434507.

It can be divided in two parts, 18165 and 60, that added together give a square (18225 = 135²).

The spelling of 1816560 in words is "one million, eight hundred sixteen thousand, five hundred sixty".