1281732848 has 20 divisors (see below), whose sum is σ = 2709117528. Its totient is φ = 582605760.

The previous prime is 1281732841. The next prime is 1281732871. The reversal of 1281732848 is 8482371821.

It is a super-2 number, since 2×1281732848² = 3285678187284382208, which contains 22 as substring.

It is a Smith number, since the sum of its digits (44) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (44).

It is a junction number, because it is equal to n+sod(n) for n = 1281732799 and 1281732808.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1281732841) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3641111 + ... + 3641462.

Almost surely, 2^1281732848 is an apocalyptic number.

It is an amenable number.

1281732848 is an abundant number, since it is smaller than the sum of its proper divisors (1427384680).

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

1281732848 is a wasteful number, since it uses less digits than its factorization.

1281732848 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7282592 (or 7282586 counting only the distinct ones).

The product of its digits is 172032, while the sum is 44.

The square root of 1281732848 is about 35801.2967362916. The cubic root of 1281732848 is about 1086.2567916527.

The spelling of 1281732848 in words is "one billion, two hundred eighty-one million, seven hundred thirty-two thousand, eight hundred forty-eight".