1268180280 has 128 divisors (see below), whose sum is σ = 4475995200. Its totient is φ = 318283776.

The previous prime is 1268180197. The next prime is 1268180299. The reversal of 1268180280 is 820818621.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 16177 + ... + 52896.

Almost surely, 2^1268180280 is an apocalyptic number.

1268180280 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1268180280 is an abundant number, since it is smaller than the sum of its proper divisors (3207814920).

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

1268180280 is a wasteful number, since it uses less digits than its factorization.

1268180280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69110 (or 69100 counting only the distinct ones).

The product of its (nonzero) digits is 12288, while the sum is 36.

The square root of 1268180280 is about 35611.5189229553. The cubic root of 1268180280 is about 1082.4146590214.

The spelling of 1268180280 in words is "one billion, two hundred sixty-eight million, one hundred eighty thousand, two hundred eighty".