7129408 has 112 divisors (see below), whose sum is σ = 17922240. Its totient is φ = 2764800.

The previous prime is 7129387. The next prime is 7129417. The reversal of 7129408 is 8049217.

It is a self number, because there is not a number n which added to its sum of digits gives 7129408.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 173868 + ... + 173908.

It is an arithmetic number, because the mean of its divisors is an integer number (160020).

Almost surely, 2^7129408 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 7129408, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (8961120).

7129408 is an abundant number, since it is smaller than the sum of its proper divisors (10792832).

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

7129408 is a wasteful number, since it uses less digits than its factorization.

7129408 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 96 (or 86 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 31.

The square root of 7129408 is about 2670.0951293915. The cubic root of 7129408 is about 192.4647307061.

The spelling of 7129408 in words is "seven million, one hundred twenty-nine thousand, four hundred eight".