286978540 has 24 divisors (see below), whose sum is σ = 603247680. Its totient is φ = 114678528.

The previous prime is 286978511. The next prime is 286978541. The reversal of 286978540 is 45879682.

It is not an unprimeable number, because it can be changed into a prime (286978541) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15556 + ... + 28564.

It is an arithmetic number, because the mean of its divisors is an integer number (25135320).

Almost surely, 2^286978540 is an apocalyptic number.

286978540 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

286978540 is an abundant number, since it is smaller than the sum of its proper divisors (316269140).

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

286978540 is a wasteful number, since it uses less digits than its factorization.

286978540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14121 (or 14119 counting only the distinct ones).

The product of its (nonzero) digits is 967680, while the sum is 49.

The square root of 286978540 is about 16940.4409623835. The cubic root of 286978540 is about 659.6037872918.

The spelling of 286978540 in words is "two hundred eighty-six million, nine hundred seventy-eight thousand, five hundred forty".