687369798 has 24 divisors (see below), whose sum is σ = 1491033648. Its totient is φ = 228856752.

The previous prime is 687369791. The next prime is 687369799. The reversal of 687369798 is 897963786.

It is a happy number.

687369798 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (687369791) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5986 + ... + 37557.

It is an arithmetic number, because the mean of its divisors is an integer number (62126402).

Almost surely, 2^687369798 is an apocalyptic number.

687369798 is an abundant number, since it is smaller than the sum of its proper divisors (803663850).

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

687369798 is a wasteful number, since it uses less digits than its factorization.

687369798 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44428 (or 44425 counting only the distinct ones).

The product of its digits is 27433728, while the sum is 63.

The square root of 687369798 is about 26217.7382319681. The cubic root of 687369798 is about 882.5313641425.

The spelling of 687369798 in words is "six hundred eighty-seven million, three hundred sixty-nine thousand, seven hundred ninety-eight".