8506240 has 32 divisors (see below), whose sum is σ = 20336760. Its totient is φ = 3402240.

The previous prime is 8506219. The next prime is 8506271. The reversal of 8506240 is 426058.

It is a tau number, because it is divible by the number of its divisors (32).

It is a super-2 number, since 2×8506240² = 144712237875200, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6006 + ... + 7285.

Almost surely, 2^8506240 is an apocalyptic number.

8506240 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

8506240 is an abundant number, since it is smaller than the sum of its proper divisors (11830520).

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

8506240 is a wasteful number, since it uses less digits than its factorization.

8506240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13310 (or 13298 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 25.

The square root of 8506240 is about 2916.5459022618. The cubic root of 8506240 is about 204.1326831308.

The spelling of 8506240 in words is "eight million, five hundred six thousand, two hundred forty".