977644 has 6 divisors (see below), whose sum is σ = 1710884. Its totient is φ = 488820.

The previous prime is 977629. The next prime is 977671. The reversal of 977644 is 446779.

It is a nialpdrome in base 10.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 122202 + ... + 122209.

2⁹⁷⁷⁶⁴⁴ is an apocalyptic number.

It is an amenable number.

977644 is a deficient number, since it is larger than the sum of its proper divisors (733240).

977644 is a wasteful number, since it uses less digits than its factorization.

977644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 244415 (or 244413 counting only the distinct ones).

The product of its digits is 42336, while the sum is 37.

The square root of 977644 is about 988.7588179126. The cubic root of 977644 is about 99.2491767534.

The spelling of 977644 in words is "nine hundred seventy-seven thousand, six hundred forty-four".