388340545 has 4 divisors (see below), whose sum is σ = 466008660. Its totient is φ = 310672432.

The previous prime is 388340543. The next prime is 388340569. The reversal of 388340545 is 545043883.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 291180096 + 97160449 = 17064^2 + 9857^2 .

It is a cyclic number.

It is not a de Polignac number, because 388340545 - 2¹ = 388340543 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 388340498 and 388340507.

It is not an unprimeable number, because it can be changed into a prime (388340543) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 38834050 + ... + 38834059.

It is an arithmetic number, because the mean of its divisors is an integer number (116502165).

Almost surely, 2^388340545 is an apocalyptic number.

It is an amenable number.

388340545 is a deficient number, since it is larger than the sum of its proper divisors (77668115).

388340545 is an equidigital number, since it uses as much as digits as its factorization.

388340545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77668114.

The product of its (nonzero) digits is 230400, while the sum is 40.

The square root of 388340545 is about 19706.3579841634. The cubic root of 388340545 is about 729.5766263394.

The spelling of 388340545 in words is "three hundred eighty-eight million, three hundred forty thousand, five hundred forty-five".