677257728 has 80 divisors (see below), whose sum is σ = 2062040640. Its totient is φ = 193499136.

The previous prime is 677257727. The next prime is 677257729. The reversal of 677257728 is 827752776.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (677257727) and next prime (677257729).

It is not an unprimeable number, because it can be changed into a prime (677257723) 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, 20743 + ... + 42246.

It is an arithmetic number, because the mean of its divisors is an integer number (25775508).

Almost surely, 2^677257728 is an apocalyptic number.

It is an amenable number.

677257728 is an abundant number, since it is smaller than the sum of its proper divisors (1384782912).

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

677257728 is an equidigital number, since it uses as much as digits as its factorization.

677257728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63017 (or 63001 counting only the distinct ones).

The product of its digits is 2304960, while the sum is 51.

The square root of 677257728 is about 26024.1758370942. The cubic root of 677257728 is about 878.1822533188.

The spelling of 677257728 in words is "six hundred seventy-seven million, two hundred fifty-seven thousand, seven hundred twenty-eight".