689427777240 has 320 divisors, whose sum is σ = 2375997624000. Its totient is φ = 179194429440.

The previous prime is 689427777223. The next prime is 689427777287. The reversal of 689427777240 is 42777724986.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 207095896 + ... + 207099224.

It is an arithmetic number, because the mean of its divisors is an integer number (7424992575).

Almost surely, 2^689427777240 is an apocalyptic number.

689427777240 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 689427777240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1187998812000).

689427777240 is an abundant number, since it is smaller than the sum of its proper divisors (1686569846760).

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

689427777240 is a wasteful number, since it uses less digits than its factorization.

689427777240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4952 (or 4939 counting only the distinct ones).

The product of its (nonzero) digits is 66382848, while the sum is 63.

The spelling of 689427777240 in words is "six hundred eighty-nine billion, four hundred twenty-seven million, seven hundred seventy-seven thousand, two hundred forty".