268978728 has 16 divisors (see below), whose sum is σ = 672446880. Its totient is φ = 89659568.

The previous prime is 268978727. The next prime is 268978729. The reversal of 268978728 is 827879862.

It is an interprime number because it is at equal distance from previous prime (268978727) and next prime (268978729).

It is a super-2 number, since 2×268978728² = 144699112232995968, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (268978727) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5603700 + ... + 5603747.

It is an arithmetic number, because the mean of its divisors is an integer number (42027930).

Almost surely, 2^268978728 is an apocalyptic number.

It is an amenable number.

268978728 is an abundant number, since it is smaller than the sum of its proper divisors (403468152).

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

268978728 is a wasteful number, since it uses less digits than its factorization.

268978728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11207456 (or 11207452 counting only the distinct ones).

The product of its digits is 5419008, while the sum is 57.

The square root of 268978728 is about 16400.5709656707. The cubic root of 268978728 is about 645.5144648515.

The spelling of 268978728 in words is "two hundred sixty-eight million, nine hundred seventy-eight thousand, seven hundred twenty-eight".