268721238 has 16 divisors (see below), whose sum is σ = 539812800. Its totient is φ = 89178696.

The previous prime is 268721209. The next prime is 268721239. The reversal of 268721238 is 832127862.

It is a super-2 number, since 2×268721238² = 144422207504505288, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 268721196 and 268721205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (268721239) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 97288 + ... + 100011.

It is an arithmetic number, because the mean of its divisors is an integer number (33738300).

Almost surely, 2^268721238 is an apocalyptic number.

268721238 is an abundant number, since it is smaller than the sum of its proper divisors (271091562).

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

268721238 is a wasteful number, since it uses less digits than its factorization.

268721238 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 197531.

The product of its digits is 64512, while the sum is 39.

The square root of 268721238 is about 16392.7190545071. The cubic root of 268721238 is about 645.3084180920.

The spelling of 268721238 in words is "two hundred sixty-eight million, seven hundred twenty-one thousand, two hundred thirty-eight".