286897128 has 64 divisors (see below), whose sum is σ = 823426560. Its totient is φ = 81598656.

The previous prime is 286897099. The next prime is 286897129. The reversal of 286897128 is 821798682.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (286897129) 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, 34375 + ... + 41897.

It is an arithmetic number, because the mean of its divisors is an integer number (12866040).

Almost surely, 2^286897128 is an apocalyptic number.

286897128 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 286897128, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (411713280).

286897128 is an abundant number, since it is smaller than the sum of its proper divisors (536529432).

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

286897128 is a wasteful number, since it uses less digits than its factorization.

286897128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7766 (or 7762 counting only the distinct ones).

The product of its digits is 774144, while the sum is 51.

The square root of 286897128 is about 16938.0379028977. The cubic root of 286897128 is about 659.5414077816.

The spelling of 286897128 in words is "two hundred eighty-six million, eight hundred ninety-seven thousand, one hundred twenty-eight".