689934456 has 64 divisors (see below), whose sum is σ = 1921190400. Its totient is φ = 229413600.

The previous prime is 689934437. The next prime is 689934467. The reversal of 689934456 is 654439986.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 89391 + ... + 96801.

It is an arithmetic number, because the mean of its divisors is an integer number (30018600).

Almost surely, 2^689934456 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 689934456, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (960595200).

689934456 is an abundant number, since it is smaller than the sum of its proper divisors (1231255944).

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

689934456 is a wasteful number, since it uses less digits than its factorization.

689934456 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7857 (or 7847 counting only the distinct ones).

The product of its digits is 5598720, while the sum is 54.

The square root of 689934456 is about 26266.6034347801. The cubic root of 689934456 is about 883.6276114886.

The spelling of 689934456 in words is "six hundred eighty-nine million, nine hundred thirty-four thousand, four hundred fifty-six".