977228 has 24 divisors (see below), whose sum is σ = 2070432. Its totient is φ = 393984.

The previous prime is 977209. The next prime is 977233. The reversal of 977228 is 822779.

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 977228.

It is an unprimeable number.

977228 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, 551 + ... + 1502.

It is an arithmetic number, because the mean of its divisors is an integer number (86268).

2⁹⁷⁷²²⁸ is an apocalyptic number.

It is an amenable number.

977228 is an abundant number, since it is smaller than the sum of its proper divisors (1093204).

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

977228 is a wasteful number, since it uses less digits than its factorization.

977228 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2081 (or 2079 counting only the distinct ones).

The product of its digits is 14112, while the sum is 35.

The square root of 977228 is about 988.5484307812. The cubic root of 977228 is about 99.2350974924.

Subtracting from 977228 its reverse (822779), we obtain a square (154449 = 393²).

The spelling of 977228 in words is "nine hundred seventy-seven thousand, two hundred twenty-eight".