287199528100 has 27 divisors (see below), whose sum is σ = 623234605441. Its totient is φ = 114877667600.

The previous prime is 287199528047. The next prime is 287199528101. The reversal of 287199528100 is 1825991782.

The square root of 287199528100 is 535910.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 103391830116 + 183807697984 = 321546^2 + 428728^2 .

It is a super-2 number, since 2×287199528100² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (287199528101) by changing a digit.

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 8 ways as a sum of consecutive naturals, for example, 5332305 + ... + 5385895.

Almost surely, 2^287199528100 is an apocalyptic number.

287199528100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

287199528100 is the 535910-th square number.

It is an amenable number.

287199528100 is an abundant number, since it is smaller than the sum of its proper divisors (336035077341).

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

287199528100 is an frugal number, since it uses more digits than its factorization.

287199528100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 107196 (or 53598 counting only the distinct ones).

The product of its (nonzero) digits is 725760, while the sum is 52.

The spelling of 287199528100 in words is "two hundred eighty-seven billion, one hundred ninety-nine million, five hundred twenty-eight thousand, one hundred".