7938389745 has 256 divisors, whose sum is σ = 17329213440. Its totient is φ = 3396556800.

The previous prime is 7938389741. The next prime is 7938389749. The reversal of 7938389745 is 5479838397.

7938389745 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (7938389741) and next prime (7938389749).

It is not a de Polignac number, because 7938389745 - 2² = 7938389741 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (7938389741) by changing a digit.

It is a polite number, since it can be written in 255 ways as a sum of consecutive naturals, for example, 60598330 + ... + 60598460.

It is an arithmetic number, because the mean of its divisors is an integer number (67692240).

Almost surely, 2^7938389745 is an apocalyptic number.

It is an amenable number.

7938389745 is an abundant number, since it is smaller than the sum of its proper divisors (9390823695).

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

7938389745 is a wasteful number, since it uses less digits than its factorization.

7938389745 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 285 (or 279 counting only the distinct ones).

The product of its digits is 45722880, while the sum is 63.

The square root of 7938389745 is about 89097.6416354552. The cubic root of 7938389745 is about 1994.8525754591.

The spelling of 7938389745 in words is "seven billion, nine hundred thirty-eight million, three hundred eighty-nine thousand, seven hundred forty-five".