1625357828 has 18 divisors (see below), whose sum is σ = 3012308586. Its totient is φ = 764717824.

The previous prime is 1625357821. The next prime is 1625357849. The reversal of 1625357828 is 8287535261.

It can be written as a sum of positive squares in 3 ways, for example, as 748131904 + 877225924 = 27352^2 + 29618^2 .

It is not an unprimeable number, because it can be changed into a prime (1625357821) by changing a digit.

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 5 ways as a sum of consecutive naturals, for example, 330008 + ... + 334896.

It is an arithmetic number, because the mean of its divisors is an integer number (167350477).

Almost surely, 2^1625357828 is an apocalyptic number.

It is an amenable number.

1625357828 is a deficient number, since it is larger than the sum of its proper divisors (1386950758).

1625357828 is an frugal number, since it uses more digits than its factorization.

1625357828 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9799 (or 4908 counting only the distinct ones).

The product of its digits is 806400, while the sum is 47.

The square root of 1625357828 is about 40315.7268072895. The cubic root of 1625357828 is about 1175.7536322336.

The spelling of 1625357828 in words is "one billion, six hundred twenty-five million, three hundred fifty-seven thousand, eight hundred twenty-eight".