8297840 has 20 divisors (see below), whose sum is σ = 19292664. Its totient is φ = 3319104.

The previous prime is 8297831. The next prime is 8297873. The reversal of 8297840 is 487928.

It is a tau number, because it is divible by the number of its divisors (20).

It is a junction number, because it is equal to n+sod(n) for n = 8297794 and 8297803.

It is a congruent number.

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, 51782 + ... + 51941.

Almost surely, 2^8297840 is an apocalyptic number.

8297840 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

8297840 is an abundant number, since it is smaller than the sum of its proper divisors (10994824).

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

8297840 is a wasteful number, since it uses less digits than its factorization.

8297840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 103736 (or 103730 counting only the distinct ones).

The product of its (nonzero) digits is 32256, while the sum is 38.

The square root of 8297840 is about 2880.5971603124. The cubic root of 8297840 is about 202.4518200674.

The spelling of 8297840 in words is "eight million, two hundred ninety-seven thousand, eight hundred forty".