1938257625 has 16 divisors (see below), whose sum is σ = 3225261312. Its totient is φ = 1033737200.

The previous prime is 1938257623. The next prime is 1938257639. The reversal of 1938257625 is 5267528391.

It is not a de Polignac number, because 1938257625 - 2¹ = 1938257623 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1938257623) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2583969 + ... + 2584718.

It is an arithmetic number, because the mean of its divisors is an integer number (201578832).

Almost surely, 2^1938257625 is an apocalyptic number.

1938257625 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1938257625 is a deficient number, since it is larger than the sum of its proper divisors (1287003687).

1938257625 is an equidigital number, since it uses as much as digits as its factorization.

1938257625 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5168705 (or 5168695 counting only the distinct ones).

The product of its digits is 907200, while the sum is 48.

The square root of 1938257625 is about 44025.6473546954. The cubic root of 1938257625 is about 1246.8202113475.

The spelling of 1938257625 in words is "one billion, nine hundred thirty-eight million, two hundred fifty-seven thousand, six hundred twenty-five".