1287887802 has 64 divisors (see below), whose sum is σ = 2784844800. Its totient is φ = 395594496.

The previous prime is 1287887789. The next prime is 1287887831. The reversal of 1287887802 is 2087887821.

It is a Harshad number since it is a multiple of its sum of digits (51).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1359493 + ... + 1360439.

It is an arithmetic number, because the mean of its divisors is an integer number (43513200).

Almost surely, 2^1287887802 is an apocalyptic number.

1287887802 is an abundant number, since it is smaller than the sum of its proper divisors (1496956998).

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

1287887802 is a wasteful number, since it uses less digits than its factorization.

1287887802 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1235.

The product of its (nonzero) digits is 802816, while the sum is 51.

The square root of 1287887802 is about 35887.1537182876. The cubic root of 1287887802 is about 1087.9927714746.

The spelling of 1287887802 in words is "one billion, two hundred eighty-seven million, eight hundred eighty-seven thousand, eight hundred two".