1281613896 has 48 divisors (see below), whose sum is σ = 3498393600. Its totient is φ = 423837792.

The previous prime is 1281613877. The next prime is 1281613903. The reversal of 1281613896 is 6983161821.

1281613896 is a `hidden beast` number, since 1 + 28 + 1 + 613 + 8 + 9 + 6 = 666.

It is a nude number because it is divisible by every one of its digits.

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, 60936 + ... + 79223.

It is an arithmetic number, because the mean of its divisors is an integer number (72883200).

Almost surely, 2^1281613896 is an apocalyptic number.

It is an amenable number.

1281613896 is an abundant number, since it is smaller than the sum of its proper divisors (2216779704).

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

1281613896 is a wasteful number, since it uses less digits than its factorization.

1281613896 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 140298 (or 140291 counting only the distinct ones).

The product of its digits is 124416, while the sum is 45.

The square root of 1281613896 is about 35799.6354171380. The cubic root of 1281613896 is about 1086.2231870381.

The spelling of 1281613896 in words is "one billion, two hundred eighty-one million, six hundred thirteen thousand, eight hundred ninety-six".