1287598220 has 24 divisors (see below), whose sum is σ = 2707504800. Its totient is φ = 514363392.

The previous prime is 1287598201. The next prime is 1287598267. The reversal of 1287598220 is 228957821.

It is a super-2 number, since 2×1287598220² = 3315818352294336800, which contains 22 as substring.

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, 26480 + ... + 57239.

It is an arithmetic number, because the mean of its divisors is an integer number (112812700).

Almost surely, 2^1287598220 is an apocalyptic number.

1287598220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1287598220 is an abundant number, since it is smaller than the sum of its proper divisors (1419906580).

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

1287598220 is a wasteful number, since it uses less digits than its factorization.

1287598220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 84497 (or 84495 counting only the distinct ones).

The product of its (nonzero) digits is 161280, while the sum is 44.

The square root of 1287598220 is about 35883.1188722497. The cubic root of 1287598220 is about 1087.9112201834.

The spelling of 1287598220 in words is "one billion, two hundred eighty-seven million, five hundred ninety-eight thousand, two hundred twenty".