687371420 has 24 divisors (see below), whose sum is σ = 1446094944. Its totient is φ = 274450496.

The previous prime is 687371407. The next prime is 687371423. The reversal of 687371420 is 24173786.

687371420 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 (687371423) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19712 + ... + 41991.

It is an arithmetic number, because the mean of its divisors is an integer number (60253956).

Almost surely, 2^687371420 is an apocalyptic number.

It is an amenable number.

687371420 is an abundant number, since it is smaller than the sum of its proper divisors (758723524).

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

687371420 is a wasteful number, since it uses less digits than its factorization.

687371420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62269 (or 62267 counting only the distinct ones).

The product of its (nonzero) digits is 56448, while the sum is 38.

The square root of 687371420 is about 26217.7691652055. The cubic root of 687371420 is about 882.5320583175.

The spelling of 687371420 in words is "six hundred eighty-seven million, three hundred seventy-one thousand, four hundred twenty".