268213638 has 32 divisors (see below), whose sum is σ = 668793600. Its totient is φ = 69665760.

The previous prime is 268213601. The next prime is 268213639. The reversal of 268213638 is 836312862.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 268213596 and 268213605.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (268213639) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 289813 + ... + 290736.

It is an arithmetic number, because the mean of its divisors is an integer number (20899800).

Almost surely, 2^268213638 is an apocalyptic number.

268213638 is an abundant number, since it is smaller than the sum of its proper divisors (400579962).

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

268213638 is a wasteful number, since it uses less digits than its factorization.

268213638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 580572.

The product of its digits is 82944, while the sum is 39.

The square root of 268213638 is about 16377.2292528376. The cubic root of 268213638 is about 644.9018443268.

The spelling of 268213638 in words is "two hundred sixty-eight million, two hundred thirteen thousand, six hundred thirty-eight".