286340640 has 96 divisors (see below), whose sum is σ = 949475520. Its totient is φ = 72336384.

The previous prime is 286340623. The next prime is 286340651. The reversal of 286340640 is 46043682.

It is a tau number, because it is divible by the number of its divisors (96).

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, 6579 + ... + 24818.

It is an arithmetic number, because the mean of its divisors is an integer number (9890370).

Almost surely, 2^286340640 is an apocalyptic number.

286340640 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

286340640 is an abundant number, since it is smaller than the sum of its proper divisors (663134880).

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

286340640 is a wasteful number, since it uses less digits than its factorization.

286340640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31434 (or 31426 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 33.

The square root of 286340640 is about 16921.6027609680. The cubic root of 286340640 is about 659.1146991535.

The spelling of 286340640 in words is "two hundred eighty-six million, three hundred forty thousand, six hundred forty".