287406664 has 16 divisors (see below), whose sum is σ = 543003120. Its totient is φ = 142605840.

The previous prime is 287406659. The next prime is 287406667. The reversal of 287406664 is 466604782.

It is a self number, because there is not a number n which added to its sum of digits gives 287406664.

It is not an unprimeable number, because it can be changed into a prime (287406667) 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, 136074 + ... + 138169.

It is an arithmetic number, because the mean of its divisors is an integer number (33937695).

Almost surely, 2^287406664 is an apocalyptic number.

It is an amenable number.

287406664 is a deficient number, since it is larger than the sum of its proper divisors (255596456).

287406664 is a wasteful number, since it uses less digits than its factorization.

287406664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 274380 (or 274376 counting only the distinct ones).

The product of its (nonzero) digits is 387072, while the sum is 43.

The square root of 287406664 is about 16953.0724059092. The cubic root of 287406664 is about 659.9316305058.

The spelling of 287406664 in words is "two hundred eighty-seven million, four hundred six thousand, six hundred sixty-four".