918890 has 16 divisors (see below), whose sum is σ = 1890432. Its totient is φ = 315024.

The previous prime is 918889. The next prime is 918899. The reversal of 918890 is 98819.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (35).

It is a self number, because there is not a number n which added to its sum of digits gives 918890.

It is not an unprimeable number, because it can be changed into a prime (918899) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6494 + ... + 6633.

It is an arithmetic number, because the mean of its divisors is an integer number (118152).

2⁹¹⁸⁸⁹⁰ is an apocalyptic number.

918890 is an abundant number, since it is smaller than the sum of its proper divisors (971542).

It is a weird number, because it is abundant, but not a pseudoperfect number.

918890 is a wasteful number, since it uses less digits than its factorization.

918890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13141.

The product of its (nonzero) digits is 5184, while the sum is 35.

The square root of 918890 is about 958.5875025265. The cubic root of 918890 is about 97.2197518949.

The spelling of 918890 in words is "nine hundred eighteen thousand, eight hundred ninety".