291980 has 24 divisors (see below), whose sum is σ = 660912. Its totient is φ = 107712.

The previous prime is 291979. The next prime is 291983. The reversal of 291980 is 89192.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 291980.

It is not an unprimeable number, because it can be changed into a prime (291983) 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, 302 + ... + 821.

It is an arithmetic number, because the mean of its divisors is an integer number (27538).

2²⁹¹⁹⁸⁰ is an apocalyptic number.

291980 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

291980 is an abundant number, since it is smaller than the sum of its proper divisors (368932).

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

291980 is a wasteful number, since it uses less digits than its factorization.

291980 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1145 (or 1143 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 29.

The square root of 291980 is about 540.3517372971. The cubic root of 291980 is about 66.3413596566.

The spelling of 291980 in words is "two hundred ninety-one thousand, nine hundred eighty".