1802980 has 12 divisors (see below), whose sum is σ = 3786300. Its totient is φ = 721184.

The previous prime is 1802923. The next prime is 1802989. The reversal of 1802980 is 892081.

It can be written as a sum of positive squares in 2 ways, for example, as 285156 + 1517824 = 534^2 + 1232^2 .

It is not an unprimeable number, because it can be changed into a prime (1802989) 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, 45055 + ... + 45094.

It is an arithmetic number, because the mean of its divisors is an integer number (315525).

2^1802980 is an apocalyptic number.

1802980 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1802980 is an abundant number, since it is smaller than the sum of its proper divisors (1983320).

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

1802980 is a wasteful number, since it uses less digits than its factorization.

1802980 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 90158 (or 90156 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 28.

The square root of 1802980 is about 1342.7509076519. The cubic root of 1802980 is about 121.7111323887.

It can be divided in two parts, 180 and 2980, that added together give a triangular number (3160 = T₇₉).

The spelling of 1802980 in words is "one million, eight hundred two thousand, nine hundred eighty".