1281760896 has 96 divisors (see below), whose sum is σ = 3686908320. Its totient is φ = 394368000.

The previous prime is 1281760889. The next prime is 1281760913. The reversal of 1281760896 is 6980671821.

It is a tau number, because it is divible by the number of its divisors (96).

It is a Smith number, since the sum of its digits (48) 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 (48).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 55021 + ... + 74771.

It is an arithmetic number, because the mean of its divisors is an integer number (38405295).

Almost surely, 2^1281760896 is an apocalyptic number.

1281760896 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1281760896, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1843454160).

1281760896 is an abundant number, since it is smaller than the sum of its proper divisors (2405147424).

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

1281760896 is a wasteful number, since it uses less digits than its factorization.

1281760896 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19794 (or 19769 counting only the distinct ones).

The product of its (nonzero) digits is 290304, while the sum is 48.

The square root of 1281760896 is about 35801.6884518035. The cubic root of 1281760896 is about 1086.2647150689.

The spelling of 1281760896 in words is "one billion, two hundred eighty-one million, seven hundred sixty thousand, eight hundred ninety-six".