2558916 has 18 divisors (see below), whose sum is σ = 6468462. Its totient is φ = 852960.

The previous prime is 2558909. The next prime is 2558917. The reversal of 2558916 is 6198552.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 2433600 + 125316 = 1560^2 + 354^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a Harshad number since it is a multiple of its sum of digits (36), and also a Moran number because the ratio is a prime number: 71081 = 2558916 / (2 + 5 + 5 + 8 + 9 + 1 + 6).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2558917) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 35505 + ... + 35576.

It is an arithmetic number, because the mean of its divisors is an integer number (359359).

2^2558916 is an apocalyptic number.

It is an amenable number.

2558916 is an abundant number, since it is smaller than the sum of its proper divisors (3909546).

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

2558916 is a wasteful number, since it uses less digits than its factorization.

2558916 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71091 (or 71086 counting only the distinct ones).

The product of its digits is 21600, while the sum is 36.

The square root of 2558916 is about 1599.6612141325. The cubic root of 2558916 is about 136.7787645298.

The spelling of 2558916 in words is "two million, five hundred fifty-eight thousand, nine hundred sixteen".