287740272 has 20 divisors (see below), whose sum is σ = 743329160. Its totient is φ = 95913408.

The previous prime is 287740267. The next prime is 287740273. The reversal of 287740272 is 272047782.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 287740272.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (287740273) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2997247 + ... + 2997342.

It is an arithmetic number, because the mean of its divisors is an integer number (37166458).

Almost surely, 2^287740272 is an apocalyptic number.

It is an amenable number.

287740272 is an abundant number, since it is smaller than the sum of its proper divisors (455588888).

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

287740272 is a wasteful number, since it uses less digits than its factorization.

287740272 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5994600 (or 5994594 counting only the distinct ones).

The product of its (nonzero) digits is 87808, while the sum is 39.

The square root of 287740272 is about 16962.9087128358. The cubic root of 287740272 is about 660.1868708681.

The spelling of 287740272 in words is "two hundred eighty-seven million, seven hundred forty thousand, two hundred seventy-two".