918424 has 16 divisors (see below), whose sum is σ = 1854720. Its totient is φ = 423840.

The previous prime is 918397. The next prime is 918431. The reversal of 918424 is 424819.

It is a zygodrome in base 2.

It is a junction number, because it is equal to n+sod(n) for n = 918392 and 918401.

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, 4312 + ... + 4519.

It is an arithmetic number, because the mean of its divisors is an integer number (115920).

2⁹¹⁸⁴²⁴ is an apocalyptic number.

It is an amenable number.

918424 is an abundant number, since it is smaller than the sum of its proper divisors (936296).

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

918424 is a wasteful number, since it uses less digits than its factorization.

918424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8850 (or 8846 counting only the distinct ones).

The product of its digits is 2304, while the sum is 28.

The square root of 918424 is about 958.3444057331. The cubic root of 918424 is about 97.2033146482.

It can be divided in two parts, 91 and 8424, that added together give a triangular number (8515 = T₁₃₀).

The spelling of 918424 in words is "nine hundred eighteen thousand, four hundred twenty-four".