268129986 has 16 divisors (see below), whose sum is σ = 536544000. Its totient is φ = 89329328.

The previous prime is 268129973. The next prime is 268129987. The reversal of 268129986 is 689921862.

It is not an unprimeable number, because it can be changed into a prime (268129987) 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, 1615 + ... + 23213.

It is an arithmetic number, because the mean of its divisors is an integer number (33534000).

Almost surely, 2^268129986 is an apocalyptic number.

268129986 is an abundant number, since it is smaller than the sum of its proper divisors (268414014).

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

268129986 is a wasteful number, since it uses less digits than its factorization.

268129986 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23673.

The product of its digits is 746496, while the sum is 51.

The square root of 268129986 is about 16374.6751418158. The cubic root of 268129986 is about 644.8347921329.

The spelling of 268129986 in words is "two hundred sixty-eight million, one hundred twenty-nine thousand, nine hundred eighty-six".