531915428 has 12 divisors (see below), whose sum is σ = 1015474992. Its totient is φ = 241779720.

The previous prime is 531915401. The next prime is 531915443. The reversal of 531915428 is 824519135.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 531915391 and 531915400.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6044450 + ... + 6044537.

It is an arithmetic number, because the mean of its divisors is an integer number (84622916).

Almost surely, 2^531915428 is an apocalyptic number.

It is an amenable number.

531915428 is a deficient number, since it is larger than the sum of its proper divisors (483559564).

531915428 is a wasteful number, since it uses less digits than its factorization.

531915428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12089002 (or 12089000 counting only the distinct ones).

The product of its digits is 43200, while the sum is 38.

The square root of 531915428 is about 23063.2917858661. The cubic root of 531915428 is about 810.2409627053.

The spelling of 531915428 in words is "five hundred thirty-one million, nine hundred fifteen thousand, four hundred twenty-eight".