689451036 has 96 divisors (see below), whose sum is σ = 1762553856. Its totient is φ = 209088000.

The previous prime is 689451029. The next prime is 689451079. The reversal of 689451036 is 630154986.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 521256 + ... + 522576.

It is an arithmetic number, because the mean of its divisors is an integer number (18359936).

Almost surely, 2^689451036 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 689451036, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (881276928).

689451036 is an abundant number, since it is smaller than the sum of its proper divisors (1073102820).

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

689451036 is a wasteful number, since it uses less digits than its factorization.

689451036 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1443 (or 1441 counting only the distinct ones).

The product of its (nonzero) digits is 155520, while the sum is 42.

The square root of 689451036 is about 26257.3996427674. The cubic root of 689451036 is about 883.4211846014.

It can be divided in two parts, 689 and 451036, that added together give a triangular number (451725 = T₉₅₀).

The spelling of 689451036 in words is "six hundred eighty-nine million, four hundred fifty-one thousand, thirty-six".