1938436625 has 8 divisors (see below), whose sum is σ = 2419169064. Its totient is φ = 1550749200.

The previous prime is 1938436597. The next prime is 1938436627. The reversal of 1938436625 is 5266348391.

It can be written as a sum of positive squares in 4 ways, for example, as 616677889 + 1321758736 = 24833^2 + 36356^2 .

It is not a de Polignac number, because 1938436625 - 2⁶ = 1938436561 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1938436625.

It is not an unprimeable number, because it can be changed into a prime (1938436627) 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 7 ways as a sum of consecutive naturals, for example, 7753622 + ... + 7753871.

It is an arithmetic number, because the mean of its divisors is an integer number (302396133).

Almost surely, 2^1938436625 is an apocalyptic number.

It is an amenable number.

1938436625 is a deficient number, since it is larger than the sum of its proper divisors (480732439).

1938436625 is an equidigital number, since it uses as much as digits as its factorization.

1938436625 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15507508 (or 15507498 counting only the distinct ones).

The product of its digits is 933120, while the sum is 47.

The square root of 1938436625 is about 44027.6802137019. The cubic root of 1938436625 is about 1246.8585918574.

The spelling of 1938436625 in words is "one billion, nine hundred thirty-eight million, four hundred thirty-six thousand, six hundred twenty-five".