286365640 has 64 divisors (see below), whose sum is σ = 733484160. Its totient is φ = 99601920.

The previous prime is 286365637. The next prime is 286365661. The reversal of 286365640 is 46563682.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a junction number, because it is equal to n+sod(n) for n = 286365593 and 286365602.

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, 4029 + ... + 24268.

It is an arithmetic number, because the mean of its divisors is an integer number (11460690).

Almost surely, 2^286365640 is an apocalyptic number.

286365640 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

286365640 is an abundant number, since it is smaller than the sum of its proper divisors (447118520).

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

286365640 is a wasteful number, since it uses less digits than its factorization.

286365640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28342 (or 28338 counting only the distinct ones).

The product of its (nonzero) digits is 207360, while the sum is 40.

The square root of 286365640 is about 16922.3414455565. The cubic root of 286365640 is about 659.1338807222.

The spelling of 286365640 in words is "two hundred eighty-six million, three hundred sixty-five thousand, six hundred forty".