287680390 has 8 divisors (see below), whose sum is σ = 517824720. Its totient is φ = 115072152.

The previous prime is 287680361. The next prime is 287680391. The reversal of 287680390 is 93086782.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (287680391) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14384010 + ... + 14384029.

It is an arithmetic number, because the mean of its divisors is an integer number (64728090).

Almost surely, 2^287680390 is an apocalyptic number.

287680390 is a deficient number, since it is larger than the sum of its proper divisors (230144330).

287680390 is a wasteful number, since it uses less digits than its factorization.

287680390 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28768046.

The product of its (nonzero) digits is 145152, while the sum is 43.

The square root of 287680390 is about 16961.1435345616. The cubic root of 287680390 is about 660.1410702430.

The spelling of 287680390 in words is "two hundred eighty-seven million, six hundred eighty thousand, three hundred ninety".