1280227240 has 32 divisors (see below), whose sum is σ = 2885625000. Its totient is φ = 511181824.

The previous prime is 1280227213. The next prime is 1280227303. The reversal of 1280227240 is 427220821.

It can be written as a sum of positive squares in 4 ways, for example, as 1095212836 + 185014404 = 33094^2 + 13602^2 .

It is a junction number, because it is equal to n+sod(n) for n = 1280227199 and 1280227208.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5365 + ... + 50884.

Almost surely, 2^1280227240 is an apocalyptic number.

1280227240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1280227240 is an abundant number, since it is smaller than the sum of its proper divisors (1605397760).

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

1280227240 is a wasteful number, since it uses less digits than its factorization.

1280227240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56829 (or 56825 counting only the distinct ones).

The product of its (nonzero) digits is 3584, while the sum is 28.

The square root of 1280227240 is about 35780.2632746043. The cubic root of 1280227240 is about 1085.8312953631.

The spelling of 1280227240 in words is "one billion, two hundred eighty million, two hundred twenty-seven thousand, two hundred forty".