9977620 has 12 divisors (see below), whose sum is σ = 20953044. Its totient is φ = 3991040.

The previous prime is 9977609. The next prime is 9977633. The reversal of 9977620 is 267799.

It can be written as a sum of positive squares in 2 ways, for example, as 5466244 + 4511376 = 2338^2 + 2124^2 .

It is an Ulam number.

It is a nialpdrome in base 10.

It is a congruent number.

It is an unprimeable 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 3 ways as a sum of consecutive naturals, for example, 249421 + ... + 249460.

It is an arithmetic number, because the mean of its divisors is an integer number (1746087).

Almost surely, 2^9977620 is an apocalyptic number.

It is an amenable number.

9977620 is an abundant number, since it is smaller than the sum of its proper divisors (10975424).

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

9977620 is a wasteful number, since it uses less digits than its factorization.

9977620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 498890 (or 498888 counting only the distinct ones).

The product of its (nonzero) digits is 47628, while the sum is 40.

The square root of 9977620 is about 3158.7370894077. The cubic root of 9977620 is about 215.2826281283.

The spelling of 9977620 in words is "nine million, nine hundred seventy-seven thousand, six hundred twenty".