689172876 has 144 divisors (see below), whose sum is σ = 2047368960. Its totient is φ = 191410560.

The previous prime is 689172871. The next prime is 689172893. The reversal of 689172876 is 678271986.

It is a super-2 number, since 2×689172876² = 949918506028222752, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (689172871) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1644595 + ... + 1645013.

It is an arithmetic number, because the mean of its divisors is an integer number (14217840).

Almost surely, 2^689172876 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 689172876, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1023684480).

689172876 is an abundant number, since it is smaller than the sum of its proper divisors (1358196084).

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

689172876 is a wasteful number, since it uses less digits than its factorization.

689172876 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 604 (or 599 counting only the distinct ones).

The product of its digits is 2032128, while the sum is 54.

The square root of 689172876 is about 26252.1023158146. The cubic root of 689172876 is about 883.3023627763.

The spelling of 689172876 in words is "six hundred eighty-nine million, one hundred seventy-two thousand, eight hundred seventy-six".