7509438428 has 12 divisors (see below), whose sum is σ = 13356952392. Its totient is φ = 3693166320.

The previous prime is 7509438413. The next prime is 7509438439. The reversal of 7509438428 is 8248349057.

It is a super-2 number, since 2×7509438428² (a number of 21 digits) contains 22 as substring.

It is a hoax number, since the sum of its digits (50) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15387950 + ... + 15388437.

It is an arithmetic number, because the mean of its divisors is an integer number (1113079366).

Almost surely, 2^7509438428 is an apocalyptic number.

It is an amenable number.

7509438428 is a deficient number, since it is larger than the sum of its proper divisors (5847513964).

7509438428 is a wasteful number, since it uses less digits than its factorization.

7509438428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30776452 (or 30776450 counting only the distinct ones).

The product of its (nonzero) digits is 1935360, while the sum is 50.

The square root of 7509438428 is about 86657.0160344793. The cubic root of 7509438428 is about 1958.2545918535.

The spelling of 7509438428 in words is "seven billion, five hundred nine million, four hundred thirty-eight thousand, four hundred twenty-eight".