1281867488 has 48 divisors (see below), whose sum is σ = 2774217600. Its totient is φ = 578198400.

The previous prime is 1281867467. The next prime is 1281867497. The reversal of 1281867488 is 8847681821.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 32213 + ... + 60011.

It is an arithmetic number, because the mean of its divisors is an integer number (57796200).

Almost surely, 2^1281867488 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1281867488, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1387108800).

1281867488 is an abundant number, since it is smaller than the sum of its proper divisors (1492350112).

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

1281867488 is a wasteful number, since it uses less digits than its factorization.

1281867488 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27951 (or 27943 counting only the distinct ones).

The product of its digits is 1376256, while the sum is 53.

The square root of 1281867488 is about 35803.1770657298. The cubic root of 1281867488 is about 1086.2948257079.

The spelling of 1281867488 in words is "one billion, two hundred eighty-one million, eight hundred sixty-seven thousand, four hundred eighty-eight".