388285561 has 2 divisors, whose sum is σ = 388285562. Its totient is φ = 388285560.

The previous prime is 388285531. The next prime is 388285567. The reversal of 388285561 is 165582883.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 313998400 + 74287161 = 17720^2 + 8619^2 .

It is a cyclic number.

It is not a de Polignac number, because 388285561 - 2⁵ = 388285529 is a prime.

It is not a weakly prime, because it can be changed into another prime (388285567) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 194142780 + 194142781.

It is an arithmetic number, because the mean of its divisors is an integer number (194142781).

Almost surely, 2^388285561 is an apocalyptic number.

It is an amenable number.

388285561 is a deficient number, since it is larger than the sum of its proper divisors (1).

388285561 is an equidigital number, since it uses as much as digits as its factorization.

388285561 is an evil number, because the sum of its binary digits is even.

The product of its digits is 460800, while the sum is 46.

The square root of 388285561 is about 19704.9628520330. The cubic root of 388285561 is about 729.5421918418.

The spelling of 388285561 in words is "three hundred eighty-eight million, two hundred eighty-five thousand, five hundred sixty-one".