268538728 has 8 divisors (see below), whose sum is σ = 503510130. Its totient is φ = 134269360.

The previous prime is 268538717. The next prime is 268538773. The reversal of 268538728 is 827835862.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 207417604 + 61121124 = 14402^2 + 7818^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-2 number, since 2×268538728² = 144226096871715968, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16783663 + ... + 16783678.

Almost surely, 2^268538728 is an apocalyptic number.

It is an amenable number.

268538728 is a deficient number, since it is larger than the sum of its proper divisors (234971402).

268538728 is a wasteful number, since it uses less digits than its factorization.

268538728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33567347 (or 33567343 counting only the distinct ones).

The product of its digits is 1290240, while the sum is 49.

The square root of 268538728 is about 16387.1513082659. The cubic root of 268538728 is about 645.1622915535.

The spelling of 268538728 in words is "two hundred sixty-eight million, five hundred thirty-eight thousand, seven hundred twenty-eight".