689362240 has 224 divisors, whose sum is σ = 2037429504. Its totient is φ = 216760320.

The previous prime is 689362153. The next prime is 689362241. The reversal of 689362240 is 42263986.

It is a tau number, because it is divible by the number of its divisors (224).

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a junction number, because it is equal to n+sod(n) for n = 689362193 and 689362202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (689362241) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1637230 + ... + 1637650.

Almost surely, 2^689362240 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 689362240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1018714752).

689362240 is an abundant number, since it is smaller than the sum of its proper divisors (1348067264).

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

689362240 is a wasteful number, since it uses less digits than its factorization.

689362240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 505 (or 495 counting only the distinct ones).

The product of its (nonzero) digits is 124416, while the sum is 40.

The square root of 689362240 is about 26255.7087125829. The cubic root of 689362240 is about 883.3832570178.

The spelling of 689362240 in words is "six hundred eighty-nine million, three hundred sixty-two thousand, two hundred forty".