1281888798 has 16 divisors (see below), whose sum is σ = 2652184080. Its totient is φ = 412561856.

The previous prime is 1281888779. The next prime is 1281888847. The reversal of 1281888798 is 8978881821.

It is a congruent number.

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, 3683415 + ... + 3683762.

It is an arithmetic number, because the mean of its divisors is an integer number (165761505).

Almost surely, 2^1281888798 is an apocalyptic number.

1281888798 is an abundant number, since it is smaller than the sum of its proper divisors (1370295282).

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

1281888798 is a wasteful number, since it uses less digits than its factorization.

1281888798 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7367211.

The product of its digits is 4128768, while the sum is 60.

The square root of 1281888798 is about 35803.4746637809. The cubic root of 1281888798 is about 1086.3008452626.

The spelling of 1281888798 in words is "one billion, two hundred eighty-one million, eight hundred eighty-eight thousand, seven hundred ninety-eight".