677726208 has 144 divisors (see below), whose sum is σ = 1985452560. Its totient is φ = 222683136.

The previous prime is 677726207. The next prime is 677726249. The reversal of 677726208 is 802627776.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (144).

It is not an unprimeable number, because it can be changed into a prime (677726207) 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, 1529635 + ... + 1530077.

It is an arithmetic number, because the mean of its divisors is an integer number (13787865).

Almost surely, 2^677726208 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 677726208, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (992726280).

677726208 is an abundant number, since it is smaller than the sum of its proper divisors (1307726352).

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

677726208 is a wasteful number, since it uses less digits than its factorization.

677726208 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 554 (or 531 counting only the distinct ones).

The product of its (nonzero) digits is 395136, while the sum is 45.

The square root of 677726208 is about 26033.1751424985. The cubic root of 677726208 is about 878.3846952055.

The spelling of 677726208 in words is "six hundred seventy-seven million, seven hundred twenty-six thousand, two hundred eight".