1980881 has 8 divisors (see below), whose sum is σ = 2316864. Its totient is φ = 1658160.

The previous prime is 1980877. The next prime is 1980899. The reversal of 1980881 is 1880891.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1980881 - 2² = 1980877 is a prime.

It is a super-2 number, since 2×1980881² = 7847779072322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1980821) 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, 2990 + ... + 3591.

It is an arithmetic number, because the mean of its divisors is an integer number (289608).

2^1980881 is an apocalyptic number.

It is an amenable number.

1980881 is a deficient number, since it is larger than the sum of its proper divisors (335983).

1980881 is an equidigital number, since it uses as much as digits as its factorization.

1980881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6631.

The product of its (nonzero) digits is 4608, while the sum is 35.

The square root of 1980881 is about 1407.4377428505. The cubic root of 1980881 is about 125.5893450128.

The spelling of 1980881 in words is "one million, nine hundred eighty thousand, eight hundred eighty-one".