286727640 has 64 divisors (see below), whose sum is σ = 889855200. Its totient is φ = 73823232.

The previous prime is 286727629. The next prime is 286727641. The reversal of 286727640 is 46727682.

It is a junction number, because it is equal to n+sod(n) for n = 286727592 and 286727601.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (286727641) 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, 37717 + ... + 44676.

Almost surely, 2^286727640 is an apocalyptic number.

286727640 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

286727640 is an abundant number, since it is smaller than the sum of its proper divisors (603127560).

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

286727640 is a wasteful number, since it uses less digits than its factorization.

286727640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82436 (or 82432 counting only the distinct ones).

The product of its (nonzero) digits is 225792, while the sum is 42.

The square root of 286727640 is about 16933.0339868554. The cubic root of 286727640 is about 659.4115048035.

Adding to 286727640 its sum of digits (42), we get a palindrome (286727682).

The spelling of 286727640 in words is "two hundred eighty-six million, seven hundred twenty-seven thousand, six hundred forty".