689124240 has 480 divisors, whose sum is σ = 2931240960. Its totient is φ = 147861504.

The previous prime is 689124239. The next prime is 689124251. The reversal of 689124240 is 42421986.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 689124195 and 689124204.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 1799089 + ... + 1799471.

It is an arithmetic number, because the mean of its divisors is an integer number (6106752).

Almost surely, 2^689124240 is an apocalyptic number.

689124240 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 689124240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1465620480).

689124240 is an abundant number, since it is smaller than the sum of its proper divisors (2242116720).

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

689124240 is a wasteful number, since it uses less digits than its factorization.

689124240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 436 (or 417 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 36.

The square root of 689124240 is about 26251.1759736588. The cubic root of 689124240 is about 883.2815836144.

The spelling of 689124240 in words is "six hundred eighty-nine million, one hundred twenty-four thousand, two hundred forty".