286136880 has 80 divisors (see below), whose sum is σ = 890059104. Its totient is φ = 76042240.

The previous prime is 286136849. The next prime is 286136891. The reversal of 286136880 is 88631682.

It is a tau number, because it is divible by the number of its divisors (80).

It is a super-2 number, since 2×286136880² = 163748628192268800, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 74200 + ... + 77960.

Almost surely, 2^286136880 is an apocalyptic number.

286136880 is a gapful number since it is divisible by the number (20) 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 286136880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (445029552).

286136880 is an abundant number, since it is smaller than the sum of its proper divisors (603922224).

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

286136880 is a wasteful number, since it uses less digits than its factorization.

286136880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4094 (or 4088 counting only the distinct ones).

The product of its (nonzero) digits is 110592, while the sum is 42.

The square root of 286136880 is about 16915.5809832237. The cubic root of 286136880 is about 658.9583200475.

The spelling of 286136880 in words is "two hundred eighty-six million, one hundred thirty-six thousand, eight hundred eighty".