8678640 has 40 divisors (see below), whose sum is σ = 26904528. Its totient is φ = 2314240.

The previous prime is 8678639. The next prime is 8678669. The reversal of 8678640 is 468768.

It is a tau number, because it is divible by the number of its divisors (40).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17841 + ... + 18320.

Almost surely, 2^8678640 is an apocalyptic number.

8678640 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

8678640 is an abundant number, since it is smaller than the sum of its proper divisors (18225888).

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

8678640 is a wasteful number, since it uses less digits than its factorization.

8678640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36177 (or 36171 counting only the distinct ones).

The product of its (nonzero) digits is 64512, while the sum is 39.

The square root of 8678640 is about 2945.9531564504. The cubic root of 8678640 is about 205.5025544168.

The spelling of 8678640 in words is "eight million, six hundred seventy-eight thousand, six hundred forty".