689952 has 24 divisors (see below), whose sum is σ = 1811376. Its totient is φ = 229952.

The previous prime is 689951. The next prime is 689957. The reversal of 689952 is 259986.

It is a happy number.

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

It is a nialpdrome in base 16.

It is a self number, because there is not a number n which added to its sum of digits gives 689952.

It is not an unprimeable number, because it can be changed into a prime (689951) 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 in 3 ways as a sum of consecutive naturals, for example, 3498 + ... + 3689.

It is an arithmetic number, because the mean of its divisors is an integer number (75474).

2⁶⁸⁹⁹⁵² is an apocalyptic number.

It is an amenable number.

689952 is an abundant number, since it is smaller than the sum of its proper divisors (1121424).

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

689952 is a wasteful number, since it uses less digits than its factorization.

689952 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7200 (or 7192 counting only the distinct ones).

The product of its digits is 38880, while the sum is 39.

The square root of 689952 is about 830.6334931846. The cubic root of 689952 is about 88.3635101201.

The spelling of 689952 in words is "six hundred eighty-nine thousand, nine hundred fifty-two".