8129040 has 40 divisors (see below), whose sum is σ = 25200768. Its totient is φ = 2167680.

The previous prime is 8129039. The next prime is 8129047. The reversal of 8129040 is 409218.

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

It is a Harshad number since it is a multiple of its sum of digits (24).

It is an Ulam number.

It is a self number, because there is not a number n which added to its sum of digits gives 8129040.

It is not an unprimeable number, because it can be changed into a prime (8129047) 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, 16696 + ... + 17175.

Almost surely, 2^8129040 is an apocalyptic number.

8129040 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

8129040 is an abundant number, since it is smaller than the sum of its proper divisors (17071728).

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

8129040 is a wasteful number, since it uses less digits than its factorization.

8129040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33887 (or 33881 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 24.

The square root of 8129040 is about 2851.1471375571. The cubic root of 8129040 is about 201.0696028844.

The spelling of 8129040 in words is "eight million, one hundred twenty-nine thousand, forty".