268436809 has 4 divisors (see below), whose sum is σ = 269311504. Its totient is φ = 267562116.

The previous prime is 268436803. The next prime is 268436821. The reversal of 268436809 is 908634862.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 268436809 - 2³ = 268436801 is a prime.

It is a super-2 number, since 2×268436809² = 144116640852204962, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (268436801) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 436887 + ... + 437500.

It is an arithmetic number, because the mean of its divisors is an integer number (67327876).

Almost surely, 2^268436809 is an apocalyptic number.

It is an amenable number.

268436809 is a deficient number, since it is larger than the sum of its proper divisors (874695).

268436809 is an equidigital number, since it uses as much as digits as its factorization.

268436809 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 874694.

The product of its (nonzero) digits is 497664, while the sum is 46.

The square root of 268436809 is about 16384.0412902312. The cubic root of 268436809 is about 645.0806613464.

It can be divided in two parts, 2684 and 36809, that added together give a palindrome (39493).

The spelling of 268436809 in words is "two hundred sixty-eight million, four hundred thirty-six thousand, eight hundred nine".