690928 has 40 divisors (see below), whose sum is σ = 1587200. Its totient is φ = 285120.

The previous prime is 690919. The next prime is 690929. The reversal of 690928 is 829096.

It is a junction number, because it is equal to n+sod(n) for n = 690893 and 690902.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (690929) 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, 3373 + ... + 3571.

It is an arithmetic number, because the mean of its divisors is an integer number (39680).

2⁶⁹⁰⁹²⁸ is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 690928, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (793600).

690928 is an abundant number, since it is smaller than the sum of its proper divisors (896272).

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

690928 is a wasteful number, since it uses less digits than its factorization.

690928 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 245 (or 239 counting only the distinct ones).

The product of its (nonzero) digits is 7776, while the sum is 34.

The square root of 690928 is about 831.2207889604. The cubic root of 690928 is about 88.4051565688.

The spelling of 690928 in words is "six hundred ninety thousand, nine hundred twenty-eight".