287669382 has 128 divisors (see below), whose sum is σ = 779563008. Its totient is φ = 68342400.

The previous prime is 287669377. The next prime is 287669387. The reversal of 287669382 is 283966782.

It is an interprime number because it is at equal distance from previous prime (287669377) and next prime (287669387).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (287669387) 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 63 ways as a sum of consecutive naturals, for example, 1267153 + ... + 1267379.

It is an arithmetic number, because the mean of its divisors is an integer number (6090336).

Almost surely, 2^287669382 is an apocalyptic number.

287669382 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 287669382, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (389781504).

287669382 is an abundant number, since it is smaller than the sum of its proper divisors (491893626).

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

287669382 is a wasteful number, since it uses less digits than its factorization.

287669382 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 474.

The product of its digits is 1741824, while the sum is 51.

The square root of 287669382 is about 16960.8190250353. The cubic root of 287669382 is about 660.1326501052.

The spelling of 287669382 in words is "two hundred eighty-seven million, six hundred sixty-nine thousand, three hundred eighty-two".