1980870 has 16 divisors (see below), whose sum is σ = 4754160. Its totient is φ = 528224.

The previous prime is 1980863. The next prime is 1980877. The reversal of 1980870 is 780891.

It is an interprime number because it is at equal distance from previous prime (1980863) and next prime (1980877).

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1980877) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 32985 + ... + 33044.

It is an arithmetic number, because the mean of its divisors is an integer number (297135).

2^1980870 is an apocalyptic number.

1980870 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1980870 is an abundant number, since it is smaller than the sum of its proper divisors (2773290).

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

1980870 is a wasteful number, since it uses less digits than its factorization.

1980870 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66039.

The product of its (nonzero) digits is 4032, while the sum is 33.

The square root of 1980870 is about 1407.4338350345. The cubic root of 1980870 is about 125.5891125429.

It can be divided in two parts, 1980 and 870, that added together give a triangular number (2850 = T₇₅).

The spelling of 1980870 in words is "one million, nine hundred eighty thousand, eight hundred seventy".