8957640 has 64 divisors (see below), whose sum is σ = 28460160. Its totient is φ = 2247680.

The previous prime is 8957629. The next prime is 8957651. The reversal of 8957640 is 467598.

8957640 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (8957629) and next prime (8957651).

It is a Smith number, since the sum of its digits (39) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 156 + ... + 4235.

It is an arithmetic number, because the mean of its divisors is an integer number (444690).

Almost surely, 2^8957640 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 8957640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14230080).

8957640 is an abundant number, since it is smaller than the sum of its proper divisors (19502520).

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

8957640 is a wasteful number, since it uses less digits than its factorization.

8957640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4422 (or 4418 counting only the distinct ones).

The product of its (nonzero) digits is 60480, while the sum is 39.

The square root of 8957640 is about 2992.9316731259. The cubic root of 8957640 is about 207.6815269280.

The spelling of 8957640 in words is "eight million, nine hundred fifty-seven thousand, six hundred forty".