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2568391 = 71632251
BaseRepresentation
bin1001110011000011000111
311211111011121
421303003013
51124142031
6131014411
730555010
oct11630307
94744147
102568391
1114a4741
12a3a407
136bc077
144ac007
1535b011
hex2730c7

2568391 has 8 divisors (see below), whose sum is σ = 2954624. Its totient is φ = 2187000.

The previous prime is 2568389. The next prime is 2568403. The reversal of 2568391 is 1938652.

2568391 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a 7-Lehmer number, since φ(2568391) divides (2568391-1)7.

It is a cyclic number.

It is not a de Polignac number, because 2568391 - 21 = 2568389 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2568331) by changing a digit.

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, 16 + ... + 2266.

It is an arithmetic number, because the mean of its divisors is an integer number (369328).

22568391 is an apocalyptic number.

2568391 is a deficient number, since it is larger than the sum of its proper divisors (386233).

2568391 is a wasteful number, since it uses less digits than its factorization.

2568391 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2421.

The product of its digits is 12960, while the sum is 34.

The square root of 2568391 is about 1602.6200423057. The cubic root of 2568391 is about 136.9473753164.

The spelling of 2568391 in words is "two million, five hundred sixty-eight thousand, three hundred ninety-one".

Divisors: 1 7 163 1141 2251 15757 366913 2568391