286942728 has 64 divisors (see below), whose sum is σ = 763992000. Its totient is φ = 89495552.

The previous prime is 286942699. The next prime is 286942729. The reversal of 286942728 is 827249682.

It is a super-2 number, since 2×286942728² = 164672258304163968, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (286942729) 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, 71068 + ... + 74996.

It is an arithmetic number, because the mean of its divisors is an integer number (11937375).

Almost surely, 2^286942728 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 286942728, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (381996000).

286942728 is an abundant number, since it is smaller than the sum of its proper divisors (477049272).

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

286942728 is a wasteful number, since it uses less digits than its factorization.

286942728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4134 (or 4130 counting only the distinct ones).

The product of its digits is 774144, while the sum is 48.

The square root of 286942728 is about 16939.3839321269. The cubic root of 286942728 is about 659.5763488714.

The spelling of 286942728 in words is "two hundred eighty-six million, nine hundred forty-two thousand, seven hundred twenty-eight".