1281800488 has 64 divisors (see below), whose sum is σ = 2587852800. Its totient is φ = 593799360.

The previous prime is 1281800467. The next prime is 1281800489. The reversal of 1281800488 is 8840081821.

It is a self number, because there is not a number n which added to its sum of digits gives 1281800488.

It is not an unprimeable number, because it can be changed into a prime (1281800489) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 769945 + ... + 771607.

It is an arithmetic number, because the mean of its divisors is an integer number (40435200).

Almost surely, 2^1281800488 is an apocalyptic number.

It is an amenable number.

1281800488 is an abundant number, since it is smaller than the sum of its proper divisors (1306052312).

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

1281800488 is a wasteful number, since it uses less digits than its factorization.

1281800488 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1822 (or 1818 counting only the distinct ones).

The product of its (nonzero) digits is 32768, while the sum is 40.

The square root of 1281800488 is about 35802.2413823492. The cubic root of 1281800488 is about 1086.2758994091.

The spelling of 1281800488 in words is "one billion, two hundred eighty-one million, eight hundred thousand, four hundred eighty-eight".