913840 has 20 divisors (see below), whose sum is σ = 2124864. Its totient is φ = 365504.

The previous prime is 913811. The next prime is 913853. The reversal of 913840 is 48319.

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

It is a super-3 number, since 3×913840³ = 2289453072333312000, which contains 333 as substring.

It is an unprimeable number.

913840 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5632 + ... + 5791.

2⁹¹³⁸⁴⁰ is an apocalyptic number.

It is an amenable number.

913840 is an abundant number, since it is smaller than the sum of its proper divisors (1211024).

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

913840 is a wasteful number, since it uses less digits than its factorization.

913840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11436 (or 11430 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 25.

The square root of 913840 is about 955.9497894764. The cubic root of 913840 is about 97.0413257857.

The spelling of 913840 in words is "nine hundred thirteen thousand, eight hundred forty".