689772 has 24 divisors (see below), whose sum is σ = 1645056. Its totient is φ = 224848.

The previous prime is 689771. The next prime is 689779. The reversal of 689772 is 277986.

It is a self number, because there is not a number n which added to its sum of digits gives 689772.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (689771) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 48 + ... + 1175.

It is an arithmetic number, because the mean of its divisors is an integer number (68544).

2⁶⁸⁹⁷⁷² is an apocalyptic number.

It is an amenable number.

689772 is an abundant number, since it is smaller than the sum of its proper divisors (955284).

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

689772 is a wasteful number, since it uses less digits than its factorization.

689772 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1277 (or 1275 counting only the distinct ones).

The product of its digits is 42336, while the sum is 39.

The square root of 689772 is about 830.5251350802. The cubic root of 689772 is about 88.3558251337.

The spelling of 689772 in words is "six hundred eighty-nine thousand, seven hundred seventy-two".