690528 has 24 divisors (see below), whose sum is σ = 1812888. Its totient is φ = 230144.

The previous prime is 690511. The next prime is 690533. The reversal of 690528 is 825096.

It is a tau number, because it is divible by the number of its divisors (24).

It is a junction number, because it is equal to n+sod(n) for n = 690495 and 690504.

It is a congruent number.

It is an unprimeable number.

690528 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3501 + ... + 3692.

It is an arithmetic number, because the mean of its divisors is an integer number (75537).

2⁶⁹⁰⁵²⁸ is an apocalyptic number.

It is an amenable number.

690528 is an abundant number, since it is smaller than the sum of its proper divisors (1122360).

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

690528 is a wasteful number, since it uses less digits than its factorization.

690528 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7206 (or 7198 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 30.

The square root of 690528 is about 830.9801441671. The cubic root of 690528 is about 88.3880930981.

The spelling of 690528 in words is "six hundred ninety thousand, five hundred twenty-eight".