677644 has 12 divisors (see below), whose sum is σ = 1293768. Its totient is φ = 308000.

The previous prime is 677639. The next prime is 677647. The reversal of 677644 is 446776.

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (677647) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7657 + ... + 7744.

It is an arithmetic number, because the mean of its divisors is an integer number (107814).

2⁶⁷⁷⁶⁴⁴ is an apocalyptic number.

It is an amenable number.

677644 is a deficient number, since it is larger than the sum of its proper divisors (616124).

677644 is a wasteful number, since it uses less digits than its factorization.

677644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15416 (or 15414 counting only the distinct ones).

The product of its digits is 28224, while the sum is 34.

The square root of 677644 is about 823.1913507806. The cubic root of 677644 is about 87.8349177830.

The spelling of 677644 in words is "six hundred seventy-seven thousand, six hundred forty-four".