688441620 has 48 divisors (see below), whose sum is σ = 1929533760. Its totient is φ = 183403776.

The previous prime is 688441613. The next prime is 688441657. The reversal of 688441620 is 26144886.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 62659 + ... + 72821.

It is an arithmetic number, because the mean of its divisors is an integer number (40198620).

Almost surely, 2^688441620 is an apocalyptic number.

688441620 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

688441620 is an abundant number, since it is smaller than the sum of its proper divisors (1241092140).

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

688441620 is a wasteful number, since it uses less digits than its factorization.

688441620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11304 (or 11302 counting only the distinct ones).

The product of its (nonzero) digits is 73728, while the sum is 39.

The square root of 688441620 is about 26238.1710490651. The cubic root of 688441620 is about 882.9898389941.

The spelling of 688441620 in words is "six hundred eighty-eight million, four hundred forty-one thousand, six hundred twenty".