287678328 has 32 divisors (see below), whose sum is σ = 821938560. Its totient is φ = 82193760.

The previous prime is 287678207. The next prime is 287678333. The reversal of 287678328 is 823876782.

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 856018 + ... + 856353.

It is an arithmetic number, because the mean of its divisors is an integer number (25685580).

Almost surely, 2^287678328 is an apocalyptic number.

287678328 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

287678328 is an abundant number, since it is smaller than the sum of its proper divisors (534260232).

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

287678328 is a wasteful number, since it uses less digits than its factorization.

287678328 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1712387 (or 1712383 counting only the distinct ones).

The product of its digits is 1806336, while the sum is 51.

The square root of 287678328 is about 16961.0827484568. The cubic root of 287678328 is about 660.1394930134.

The spelling of 287678328 in words is "two hundred eighty-seven million, six hundred seventy-eight thousand, three hundred twenty-eight".