725031428 has 48 divisors (see below), whose sum is σ = 1454760384. Its totient is φ = 313165440.

The previous prime is 725031403. The next prime is 725031449. The reversal of 725031428 is 824130527.

It is a junction number, because it is equal to n+sod(n) for n = 725031394 and 725031403.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 64826 + ... + 75182.

It is an arithmetic number, because the mean of its divisors is an integer number (30307508).

Almost surely, 2^725031428 is an apocalyptic number.

It is an amenable number.

725031428 is an abundant number, since it is smaller than the sum of its proper divisors (729728956).

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

725031428 is a wasteful number, since it uses less digits than its factorization.

725031428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10452 (or 10450 counting only the distinct ones).

The product of its (nonzero) digits is 13440, while the sum is 32.

The square root of 725031428 is about 26926.4076326568. The cubic root of 725031428 is about 898.3638702445.

Subtracting 725031428 from its reverse (824130527), we obtain a palindrome (99099099).

The spelling of 725031428 in words is "seven hundred twenty-five million, thirty-one thousand, four hundred twenty-eight".