388285643 has 2 divisors, whose sum is σ = 388285644. Its totient is φ = 388285642.

The previous prime is 388285607. The next prime is 388285663. The reversal of 388285643 is 346582883.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 388285643 - 2¹⁰ = 388284619 is a prime.

It is not a weakly prime, because it can be changed into another prime (388285663) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 194142821 + 194142822.

It is an arithmetic number, because the mean of its divisors is an integer number (194142822).

Almost surely, 2^388285643 is an apocalyptic number.

388285643 is a deficient number, since it is larger than the sum of its proper divisors (1).

388285643 is an equidigital number, since it uses as much as digits as its factorization.

388285643 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1105920, while the sum is 47.

The square root of 388285643 is about 19704.9649327270. The cubic root of 388285643 is about 729.5422431979.

The spelling of 388285643 in words is "three hundred eighty-eight million, two hundred eighty-five thousand, six hundred forty-three".