687454746 has 64 divisors (see below), whose sum is σ = 1549342080. Its totient is φ = 201519360.

The previous prime is 687454739. The next prime is 687454769. The reversal of 687454746 is 647454786.

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, 480360 + ... + 481788.

It is an arithmetic number, because the mean of its divisors is an integer number (24208470).

Almost surely, 2^687454746 is an apocalyptic number.

687454746 is a gapful number since it is divisible by the number (66) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 687454746, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (774671040).

687454746 is an abundant number, since it is smaller than the sum of its proper divisors (861887334).

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

687454746 is a wasteful number, since it uses less digits than its factorization.

687454746 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1679.

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

The square root of 687454746 is about 26219.3582301322. The cubic root of 687454746 is about 882.5677182692.

The spelling of 687454746 in words is "six hundred eighty-seven million, four hundred fifty-four thousand, seven hundred forty-six".