677558728 has 32 divisors (see below), whose sum is σ = 1583904960. Its totient is φ = 263983680.

The previous prime is 677558719. The next prime is 677558729. The reversal of 677558728 is 827855776.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (677558729) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 549351 + ... + 550582.

It is an arithmetic number, because the mean of its divisors is an integer number (49497030).

Almost surely, 2^677558728 is an apocalyptic number.

It is an amenable number.

677558728 is an abundant number, since it is smaller than the sum of its proper divisors (906346232).

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

677558728 is a wasteful number, since it uses less digits than its factorization.

677558728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1099957 (or 1099953 counting only the distinct ones).

The product of its digits is 6585600, while the sum is 55.

The square root of 677558728 is about 26029.9582788755. The cubic root of 677558728 is about 878.3123336398.

The spelling of 677558728 in words is "six hundred seventy-seven million, five hundred fifty-eight thousand, seven hundred twenty-eight".