977856 has 56 divisors (see below), whose sum is σ = 2828544. Its totient is φ = 295680.

The previous prime is 977849. The next prime is 977861. The reversal of 977856 is 658779.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 977856.

It is an unprimeable number.

977856 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1881 + ... + 2343.

2⁹⁷⁷⁸⁵⁶ is an apocalyptic number.

977856 is a gapful number since it is divisible by the number (96) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 977856, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1414272).

977856 is an abundant number, since it is smaller than the sum of its proper divisors (1850688).

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

977856 is a wasteful number, since it uses less digits than its factorization.

977856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 489 (or 479 counting only the distinct ones).

The product of its digits is 105840, while the sum is 42.

The square root of 977856 is about 988.8660172137. The cubic root of 977856 is about 99.2563502251.

The spelling of 977856 in words is "nine hundred seventy-seven thousand, eight hundred fifty-six".