7504428 has 12 divisors (see below), whose sum is σ = 17510360. Its totient is φ = 2501472.

The previous prime is 7504423. The next prime is 7504439. The reversal of 7504428 is 8244057.

It is a tau number, because it is divible by the number of its divisors (12).

It is a junction number, because it is equal to n+sod(n) for n = 7504395 and 7504404.

It is not an unprimeable number, because it can be changed into a prime (7504421) 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, 312673 + ... + 312696.

Almost surely, 2^7504428 is an apocalyptic number.

It is an amenable number.

7504428 is an abundant number, since it is smaller than the sum of its proper divisors (10005932).

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

7504428 is a wasteful number, since it uses less digits than its factorization.

7504428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 625376 (or 625374 counting only the distinct ones).

The product of its (nonzero) digits is 8960, while the sum is 30.

The square root of 7504428 is about 2739.4211067304. The cubic root of 7504428 is about 195.7818967773.

The spelling of 7504428 in words is "seven million, five hundred four thousand, four hundred twenty-eight".