687230897640 has 384 divisors, whose sum is σ = 2626947417600. Its totient is φ = 142742691840.

The previous prime is 687230897627. The next prime is 687230897701. The reversal of 687230897640 is 46798032786.

It is a Harshad number since it is a multiple of its sum of digits (60).

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, 2780305 + ... + 3017375.

It is an arithmetic number, because the mean of its divisors is an integer number (6841008900).

Almost surely, 2^687230897640 is an apocalyptic number.

687230897640 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 687230897640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1313473708800).

687230897640 is an abundant number, since it is smaller than the sum of its proper divisors (1939716519960).

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

687230897640 is a wasteful number, since it uses less digits than its factorization.

687230897640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 237145 (or 237134 counting only the distinct ones).

The product of its (nonzero) digits is 24385536, while the sum is 60.

The spelling of 687230897640 in words is "six hundred eighty-seven billion, two hundred thirty million, eight hundred ninety-seven thousand, six hundred forty".