11297840 has 20 divisors (see below), whose sum is σ = 26267664. Its totient is φ = 4519104.

The previous prime is 11297821. The next prime is 11297861. The reversal of 11297840 is 4879211.

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 = 11297797 and 11297806.

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, 70532 + ... + 70691.

Almost surely, 2^11297840 is an apocalyptic number.

11297840 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11297840 is an abundant number, since it is smaller than the sum of its proper divisors (14969824).

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

11297840 is a wasteful number, since it uses less digits than its factorization.

11297840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 141236 (or 141230 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 32.

The square root of 11297840 is about 3361.2259668163. The cubic root of 11297840 is about 224.3874035865.

The spelling of 11297840 in words is "eleven million, two hundred ninety-seven thousand, eight hundred forty".