913720 has 32 divisors (see below), whose sum is σ = 2099520. Its totient is φ = 357760.

The previous prime is 913709. The next prime is 913723. The reversal of 913720 is 27319.

It is a junction number, because it is equal to n+sod(n) for n = 913691 and 913700.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (913723) by changing a digit.

913720 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 7 ways as a sum of consecutive naturals, for example, 1905 + ... + 2335.

It is an arithmetic number, because the mean of its divisors is an integer number (65610).

2⁹¹³⁷²⁰ is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 913720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1049760).

913720 is an abundant number, since it is smaller than the sum of its proper divisors (1185800).

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

913720 is a wasteful number, since it uses less digits than its factorization.

913720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 495 (or 491 counting only the distinct ones).

The product of its (nonzero) digits is 378, while the sum is 22.

The square root of 913720 is about 955.8870226130. The cubic root of 913720 is about 97.0370779711.

The spelling of 913720 in words is "nine hundred thirteen thousand, seven hundred twenty".