1287393210 has 64 divisors (see below), whose sum is σ = 3440828160. Its totient is φ = 342527040.

The previous prime is 1287393137. The next prime is 1287393271. The reversal of 1287393210 is 123937821.

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, 119299 + ... + 129641.

It is an arithmetic number, because the mean of its divisors is an integer number (53762940).

Almost surely, 2^1287393210 is an apocalyptic number.

1287393210 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 1287393210, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1720414080).

1287393210 is an abundant number, since it is smaller than the sum of its proper divisors (2153434950).

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

1287393210 is a wasteful number, since it uses less digits than its factorization.

1287393210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10820 (or 10814 counting only the distinct ones).

The product of its (nonzero) digits is 18144, while the sum is 36.

The square root of 1287393210 is about 35880.2621227883. The cubic root of 1287393210 is about 1087.8534784350.

The spelling of 1287393210 in words is "one billion, two hundred eighty-seven million, three hundred ninety-three thousand, two hundred ten".