8642740 has 12 divisors (see below), whose sum is σ = 18149796. Its totient is φ = 3457088.

The previous prime is 8642723. The next prime is 8642747. The reversal of 8642740 is 472468.

It can be written as a sum of positive squares in 2 ways, for example, as 1449616 + 7193124 = 1204^2 + 2682^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8642747) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 216049 + ... + 216088.

It is an arithmetic number, because the mean of its divisors is an integer number (1512483).

Almost surely, 2^8642740 is an apocalyptic number.

It is an amenable number.

8642740 is an abundant number, since it is smaller than the sum of its proper divisors (9507056).

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

8642740 is a wasteful number, since it uses less digits than its factorization.

8642740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 432146 (or 432144 counting only the distinct ones).

The product of its (nonzero) digits is 10752, while the sum is 31.

The square root of 8642740 is about 2939.8537378584. The cubic root of 8642740 is about 205.2188026702.

The spelling of 8642740 in words is "eight million, six hundred forty-two thousand, seven hundred forty".