689774436 has 72 divisors (see below), whose sum is σ = 1913216760. Its totient is φ = 208226304.

The previous prime is 689774429. The next prime is 689774467. The reversal of 689774436 is 634477986.

It is a happy number.

689774436 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 114062400 + 575712036 = 10680^2 + 23994^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 10900 + ... + 38708.

It is an arithmetic number, because the mean of its divisors is an integer number (26572455).

Almost surely, 2^689774436 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 689774436, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (956608380).

689774436 is an abundant number, since it is smaller than the sum of its proper divisors (1223442324).

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

689774436 is a wasteful number, since it uses less digits than its factorization.

689774436 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27885 (or 27880 counting only the distinct ones).

The product of its digits is 6096384, while the sum is 54.

The square root of 689774436 is about 26263.5571848141. The cubic root of 689774436 is about 883.5592914609.

The spelling of 689774436 in words is "six hundred eighty-nine million, seven hundred seventy-four thousand, four hundred thirty-six".