8097640 has 16 divisors (see below), whose sum is σ = 18219780. Its totient is φ = 3239040.

The previous prime is 8097637. The next prime is 8097643. The reversal of 8097640 is 467908.

It is an interprime number because it is at equal distance from previous prime (8097637) and next prime (8097643).

It can be written as a sum of positive squares in 2 ways, for example, as 7963684 + 133956 = 2822^2 + 366^2 .

It is a junction number, because it is equal to n+sod(n) for n = 8097596 and 8097605.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8097643) 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, 101181 + ... + 101260.

Almost surely, 2^8097640 is an apocalyptic number.

It is an amenable number.

8097640 is an abundant number, since it is smaller than the sum of its proper divisors (10122140).

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

8097640 is a wasteful number, since it uses less digits than its factorization.

8097640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 202452 (or 202448 counting only the distinct ones).

The product of its (nonzero) digits is 12096, while the sum is 34.

The square root of 8097640 is about 2845.6352542095. The cubic root of 8097640 is about 200.8103786639.

The spelling of 8097640 in words is "eight million, ninety-seven thousand, six hundred forty".