287987664 has 20 divisors (see below), whose sum is σ = 743968256. Its totient is φ = 95995872.

The previous prime is 287987657. The next prime is 287987677. The reversal of 287987664 is 466789782.

It is a Smith number, since the sum of its digits (57) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

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, 2999824 + ... + 2999919.

Almost surely, 2^287987664 is an apocalyptic number.

287987664 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

287987664 is an abundant number, since it is smaller than the sum of its proper divisors (455980592).

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

287987664 is a wasteful number, since it uses less digits than its factorization.

287987664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5999754 (or 5999748 counting only the distinct ones).

The product of its digits is 8128512, while the sum is 57.

The square root of 287987664 is about 16970.1992916996. The cubic root of 287987664 is about 660.3760208076.

The spelling of 287987664 in words is "two hundred eighty-seven million, nine hundred eighty-seven thousand, six hundred sixty-four".