690328 has 8 divisors (see below), whose sum is σ = 1294380. Its totient is φ = 345160.

The previous prime is 690323. The next prime is 690341. The reversal of 690328 is 823096.

It is a tau number, because it is divible by the number of its divisors (8).

It is a hoax number, since the sum of its digits (28) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 690296 and 690305.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (690323) by changing a digit.

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 as a sum of consecutive naturals, namely, 43138 + ... + 43153.

2⁶⁹⁰³²⁸ is an apocalyptic number.

It is an amenable number.

690328 is a deficient number, since it is larger than the sum of its proper divisors (604052).

690328 is a wasteful number, since it uses less digits than its factorization.

690328 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 86297 (or 86293 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 28.

The square root of 690328 is about 830.8597956334. The cubic root of 690328 is about 88.3795588917.

The spelling of 690328 in words is "six hundred ninety thousand, three hundred twenty-eight".