8961140 has 12 divisors (see below), whose sum is σ = 18818436. Its totient is φ = 3584448.

The previous prime is 8961137. The next prime is 8961149. The reversal of 8961140 is 411698.

It can be written as a sum of positive squares in 2 ways, for example, as 2630884 + 6330256 = 1622^2 + 2516^2 .

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8961149) by changing a digit.

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, 224009 + ... + 224048.

It is an arithmetic number, because the mean of its divisors is an integer number (1568203).

Almost surely, 2^8961140 is an apocalyptic number.

It is an amenable number.

8961140 is an abundant number, since it is smaller than the sum of its proper divisors (9857296).

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

8961140 is a wasteful number, since it uses less digits than its factorization.

8961140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 448066 (or 448064 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 29.

The square root of 8961140 is about 2993.5163269974. The cubic root of 8961140 is about 207.7085723958.

The spelling of 8961140 in words is "eight million, nine hundred sixty-one thousand, one hundred forty".