286270640 has 20 divisors (see below), whose sum is σ = 665579424. Its totient is φ = 114508224.

The previous prime is 286270601. The next prime is 286270661. The reversal of 286270640 is 46072682.

286270640 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (20).

It is a self number, because there is not a number n which added to its sum of digits gives 286270640.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1789112 + ... + 1789271.

Almost surely, 2^286270640 is an apocalyptic number.

286270640 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

286270640 is an abundant number, since it is smaller than the sum of its proper divisors (379308784).

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

286270640 is a wasteful number, since it uses less digits than its factorization.

286270640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3578396 (or 3578390 counting only the distinct ones).

The product of its (nonzero) digits is 32256, while the sum is 35.

The square root of 286270640 is about 16919.5342725502. The cubic root of 286270640 is about 659.0609848209.

The spelling of 286270640 in words is "two hundred eighty-six million, two hundred seventy thousand, six hundred forty".