689321376 has 72 divisors (see below), whose sum is σ = 1982356740. Its totient is φ = 227183616.

The previous prime is 689321371. The next prime is 689321429. The reversal of 689321376 is 673123986.

It can be written as a sum of positive squares in 2 ways, for example, as 679957776 + 9363600 = 26076^2 + 3060^2 .

It is a tau number, because it is divible by the number of its divisors (72).

It is not an unprimeable number, because it can be changed into a prime (689321371) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 12186 + ... + 39078.

Almost surely, 2^689321376 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 689321376, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (991178370).

689321376 is an abundant number, since it is smaller than the sum of its proper divisors (1293035364).

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

689321376 is a wasteful number, since it uses less digits than its factorization.

689321376 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26998 (or 26987 counting only the distinct ones).

The product of its digits is 326592, while the sum is 45.

The square root of 689321376 is about 26254.9305083826. The cubic root of 689321376 is about 883.3658016150.

The spelling of 689321376 in words is "six hundred eighty-nine million, three hundred twenty-one thousand, three hundred seventy-six".