689713920 has 288 divisors, whose sum is σ = 2798154240. Its totient is φ = 157593600.

The previous prime is 689713909. The next prime is 689713939. The reversal of 689713920 is 29317986.

It is a tau number, because it is divible by the number of its divisors (288).

It is a Harshad number since it is a multiple of its sum of digits (45).

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, 240495 + ... + 243345.

Almost surely, 2^689713920 is an apocalyptic number.

689713920 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 689713920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1399077120).

689713920 is an abundant number, since it is smaller than the sum of its proper divisors (2108440320).

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

689713920 is a wasteful number, since it uses less digits than its factorization.

689713920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2888 (or 2868 counting only the distinct ones).

The product of its (nonzero) digits is 163296, while the sum is 45.

The square root of 689713920 is about 26262.4050688432. The cubic root of 689713920 is about 883.5334515944.

The spelling of 689713920 in words is "six hundred eighty-nine million, seven hundred thirteen thousand, nine hundred twenty".