287148666 has 96 divisors (see below), whose sum is σ = 715462272. Its totient is φ = 75202560.

The previous prime is 287148643. The next prime is 287148677. The reversal of 287148666 is 666841782.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 497370 + ... + 497946.

It is an arithmetic number, because the mean of its divisors is an integer number (7452732).

Almost surely, 2^287148666 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 287148666, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (357731136).

287148666 is an abundant number, since it is smaller than the sum of its proper divisors (428313606).

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

287148666 is a wasteful number, since it uses less digits than its factorization.

287148666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 664 (or 647 counting only the distinct ones).

The product of its digits is 774144, while the sum is 48.

The square root of 287148666 is about 16945.4615162881. The cubic root of 287148666 is about 659.7341031761.

The spelling of 287148666 in words is "two hundred eighty-seven million, one hundred forty-eight thousand, six hundred sixty-six".