8140840 has 32 divisors (see below), whose sum is σ = 18408960. Its totient is φ = 3240000.

The previous prime is 8140831. The next prime is 8140843. The reversal of 8140840 is 480418.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8140843) 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, 10465 + ... + 11215.

It is an arithmetic number, because the mean of its divisors is an integer number (575280).

Almost surely, 2^8140840 is an apocalyptic number.

It is an amenable number.

8140840 is an abundant number, since it is smaller than the sum of its proper divisors (10268120).

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

8140840 is a wasteful number, since it uses less digits than its factorization.

8140840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1033 (or 1029 counting only the distinct ones).

The product of its (nonzero) digits is 1024, while the sum is 25.

The square root of 8140840 is about 2853.2157296636. The cubic root of 8140840 is about 201.1668457821.

The spelling of 8140840 in words is "eight million, one hundred forty thousand, eight hundred forty".