388934045 has 4 divisors (see below), whose sum is σ = 466720860. Its totient is φ = 311147232.

The previous prime is 388934027. The next prime is 388934089. The reversal of 388934045 is 540439883.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 540439883 = 18481 ⋅29243.

It can be written as a sum of positive squares in 2 ways, for example, as 173343556 + 215590489 = 13166^2 + 14683^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-388934045 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 388933987 and 388934005.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 38893400 + ... + 38893409.

It is an arithmetic number, because the mean of its divisors is an integer number (116680215).

Almost surely, 2^388934045 is an apocalyptic number.

It is an amenable number.

388934045 is a deficient number, since it is larger than the sum of its proper divisors (77786815).

388934045 is an equidigital number, since it uses as much as digits as its factorization.

388934045 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77786814.

The product of its (nonzero) digits is 414720, while the sum is 44.

The square root of 388934045 is about 19721.4108268146. The cubic root of 388934045 is about 729.9481072764.

The spelling of 388934045 in words is "three hundred eighty-eight million, nine hundred thirty-four thousand, forty-five".