2258918 has 4 divisors (see below), whose sum is σ = 3388380. Its totient is φ = 1129458.

The previous prime is 2258917. The next prime is 2258947. The reversal of 2258918 is 8198522.

It is a semiprime because it is the product of two primes.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2258917) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 564728 + ... + 564731.

It is an arithmetic number, because the mean of its divisors is an integer number (847095).

2^2258918 is an apocalyptic number.

2258918 is a deficient number, since it is larger than the sum of its proper divisors (1129462).

2258918 is a wasteful number, since it uses less digits than its factorization.

2258918 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1129461.

The product of its digits is 11520, while the sum is 35.

The square root of 2258918 is about 1502.9697269074. The cubic root of 2258918 is about 131.2099657188.

The spelling of 2258918 in words is "two million, two hundred fifty-eight thousand, nine hundred eighteen".