287328825 has 36 divisors (see below), whose sum is σ = 588160768. Its totient is φ = 131349600.

The previous prime is 287328823. The next prime is 287328851. The reversal of 287328825 is 528823782.

It is not a de Polignac number, because 287328825 - 2¹ = 287328823 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (287328823) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 89641 + ... + 92790.

Almost surely, 2^287328825 is an apocalyptic number.

287328825 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

287328825 is an abundant number, since it is smaller than the sum of its proper divisors (300831943).

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

287328825 is a wasteful number, since it uses less digits than its factorization.

287328825 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 182454 (or 182446 counting only the distinct ones).

The product of its digits is 430080, while the sum is 45.

The square root of 287328825 is about 16950.7765308849. The cubic root of 287328825 is about 659.8720481988.

The spelling of 287328825 in words is "two hundred eighty-seven million, three hundred twenty-eight thousand, eight hundred twenty-five".