268156403 has 4 divisors (see below), whose sum is σ = 270921000. Its totient is φ = 265391808.

The previous prime is 268156393. The next prime is 268156423. The reversal of 268156403 is 304651862.

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

It is a cyclic number.

It is not a de Polignac number, because 268156403 - 2¹⁸ = 267894259 is a prime.

It is not an unprimeable number, because it can be changed into a prime (268156423) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1382153 + ... + 1382346.

It is an arithmetic number, because the mean of its divisors is an integer number (67730250).

Almost surely, 2^268156403 is an apocalyptic number.

268156403 is a deficient number, since it is larger than the sum of its proper divisors (2764597).

268156403 is an equidigital number, since it uses as much as digits as its factorization.

268156403 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2764596.

The product of its (nonzero) digits is 34560, while the sum is 35.

The square root of 268156403 is about 16375.4817639055. The cubic root of 268156403 is about 644.8559684805.

The spelling of 268156403 in words is "two hundred sixty-eight million, one hundred fifty-six thousand, four hundred three".