686477454 has 64 divisors (see below), whose sum is σ = 1535213568. Its totient is φ = 203212800.

The previous prime is 686477443. The next prime is 686477489. The reversal of 686477454 is 454774686.

It is a junction number, because it is equal to n+sod(n) for n = 686477397 and 686477406.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 465939 + ... + 467409.

It is an arithmetic number, because the mean of its divisors is an integer number (23987712).

Almost surely, 2^686477454 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 686477454, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (767606784).

686477454 is an abundant number, since it is smaller than the sum of its proper divisors (848736114).

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

686477454 is a wasteful number, since it uses less digits than its factorization.

686477454 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1713.

The product of its digits is 4515840, while the sum is 51.

The square root of 686477454 is about 26200.7147612427. The cubic root of 686477454 is about 882.1492977968.

The spelling of 686477454 in words is "six hundred eighty-six million, four hundred seventy-seven thousand, four hundred fifty-four".