689370240 has 256 divisors, whose sum is σ = 2405894400. Its totient is φ = 166871040.

The previous prime is 689370229. The next prime is 689370251. The reversal of 689370240 is 42073986.

It is an interprime number because it is at equal distance from previous prime (689370229) and next prime (689370251).

It is a Harshad number since it is a multiple of its sum of digits (39).

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, 1771966 + ... + 1772354.

It is an arithmetic number, because the mean of its divisors is an integer number (9398025).

Almost surely, 2^689370240 is an apocalyptic number.

689370240 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 689370240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1202947200).

689370240 is an abundant number, since it is smaller than the sum of its proper divisors (1716524160).

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

689370240 is a wasteful number, since it uses less digits than its factorization.

689370240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 495 (or 483 counting only the distinct ones).

The product of its (nonzero) digits is 72576, while the sum is 39.

The square root of 689370240 is about 26255.8610599615. The cubic root of 689370240 is about 883.3866742046.

The spelling of 689370240 in words is "six hundred eighty-nine million, three hundred seventy thousand, two hundred forty".