8697640 has 32 divisors (see below), whose sum is σ = 22366080. Its totient is φ = 2981952.

The previous prime is 8697613. The next prime is 8697641. The reversal of 8697640 is 467968.

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a junction number, because it is equal to n+sod(n) for n = 8697593 and 8697602.

It is not an unprimeable number, because it can be changed into a prime (8697641) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15252 + ... + 15811.

It is an arithmetic number, because the mean of its divisors is an integer number (698940).

Almost surely, 2^8697640 is an apocalyptic number.

It is an amenable number.

8697640 is an abundant number, since it is smaller than the sum of its proper divisors (13668440).

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

8697640 is a wasteful number, since it uses less digits than its factorization.

8697640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31081 (or 31077 counting only the distinct ones).

The product of its (nonzero) digits is 72576, while the sum is 40.

The square root of 8697640 is about 2949.1761561494. The cubic root of 8697640 is about 205.6524128665.

The spelling of 8697640 in words is "eight million, six hundred ninety-seven thousand, six hundred forty".