8491880 has 16 divisors (see below), whose sum is σ = 19106820. Its totient is φ = 3396736.

The previous prime is 8491831. The next prime is 8491897. The reversal of 8491880 is 881948.

It can be written as a sum of positive squares in 2 ways, for example, as 8491396 + 484 = 2914^2 + 22^2 .

It is a super-2 number, since 2×8491880² = 144224051868800, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 106109 + ... + 106188.

Almost surely, 2^8491880 is an apocalyptic number.

It is an amenable number.

8491880 is an abundant number, since it is smaller than the sum of its proper divisors (10614940).

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

8491880 is a wasteful number, since it uses less digits than its factorization.

8491880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 212308 (or 212304 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 38.

The square root of 8491880 is about 2914.0830461742. The cubic root of 8491880 is about 204.0177480394.

The spelling of 8491880 in words is "eight million, four hundred ninety-one thousand, eight hundred eighty".