977780 has 12 divisors (see below), whose sum is σ = 2053380. Its totient is φ = 391104.

The previous prime is 977761. The next prime is 977791. The reversal of 977780 is 87779.

It can be written as a sum of positive squares in 2 ways, for example, as 465124 + 512656 = 682^2 + 716^2 .

It is a nialpdrome in base 16.

It is a congruent number.

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 in 3 ways as a sum of consecutive naturals, for example, 24425 + ... + 24464.

It is an arithmetic number, because the mean of its divisors is an integer number (171115).

2⁹⁷⁷⁷⁸⁰ is an apocalyptic number.

It is an amenable number.

977780 is an abundant number, since it is smaller than the sum of its proper divisors (1075600).

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

977780 is a wasteful number, since it uses less digits than its factorization.

977780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48898 (or 48896 counting only the distinct ones).

The product of its (nonzero) digits is 24696, while the sum is 38.

The square root of 977780 is about 988.8275886119. The cubic root of 977780 is about 99.2537787224.

The spelling of 977780 in words is "nine hundred seventy-seven thousand, seven hundred eighty".