689390592 has 176 divisors, whose sum is σ = 2094031872. Its totient is φ = 199598080.

The previous prime is 689390573. The next prime is 689390593. The reversal of 689390592 is 295093986.

It is a tau number, because it is divible by the number of its divisors (176).

It is a super-2 number, since 2×689390592² = 950518776676220928, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (689390593) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 776773 + ... + 777659.

Almost surely, 2^689390592 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 689390592, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1047015936).

689390592 is an abundant number, since it is smaller than the sum of its proper divisors (1404641280).

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

689390592 is a wasteful number, since it uses less digits than its factorization.

689390592 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 944 (or 926 counting only the distinct ones).

The product of its (nonzero) digits is 1049760, while the sum is 51.

The square root of 689390592 is about 26256.2486277077. The cubic root of 689390592 is about 883.3953674088.

The spelling of 689390592 in words is "six hundred eighty-nine million, three hundred ninety thousand, five hundred ninety-two".