528267640 has 32 divisors (see below), whose sum is σ = 1251162000. Its totient is φ = 200185344.

The previous prime is 528267613. The next prime is 528267643. The reversal of 528267640 is 46762825.

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a junction number, because it is equal to n+sod(n) for n = 528267593 and 528267602.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (528267643) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 346785 + ... + 348304.

Almost surely, 2^528267640 is an apocalyptic number.

It is an amenable number.

528267640 is an abundant number, since it is smaller than the sum of its proper divisors (722894360).

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

528267640 is a wasteful number, since it uses less digits than its factorization.

528267640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 695119 (or 695115 counting only the distinct ones).

The product of its (nonzero) digits is 161280, while the sum is 40.

The square root of 528267640 is about 22984.0736163109. The cubic root of 528267640 is about 808.3845463945.

The spelling of 528267640 in words is "five hundred twenty-eight million, two hundred sixty-seven thousand, six hundred forty".