1820756 has 12 divisors (see below), whose sum is σ = 3641568. Its totient is φ = 780312.

The previous prime is 1820747. The next prime is 1820759. The reversal of 1820756 is 6570281.

1820756 is an admirable number.

It is a hoax number, since the sum of its digits (29) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1820759) 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, 32486 + ... + 32541.

It is an arithmetic number, because the mean of its divisors is an integer number (303464).

2^1820756 is an apocalyptic number.

It is an amenable number.

1820756 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

1820756 is a wasteful number, since it uses less digits than its factorization.

1820756 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65038 (or 65036 counting only the distinct ones).

The product of its (nonzero) digits is 3360, while the sum is 29.

The square root of 1820756 is about 1349.3539194741. The cubic root of 1820756 is about 122.1098178073.

The spelling of 1820756 in words is "one million, eight hundred twenty thousand, seven hundred fifty-six".