388728523 has 2 divisors, whose sum is σ = 388728524. Its totient is φ = 388728522.

The previous prime is 388728491. The next prime is 388728547. The reversal of 388728523 is 325827883.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 388728523 - 2⁵ = 388728491 is a prime.

It is a super-2 number, since 2×388728523² = 302219729187523058, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (388728583) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 194364261 + 194364262.

It is an arithmetic number, because the mean of its divisors is an integer number (194364262).

Almost surely, 2^388728523 is an apocalyptic number.

388728523 is a deficient number, since it is larger than the sum of its proper divisors (1).

388728523 is an equidigital number, since it uses as much as digits as its factorization.

388728523 is an evil number, because the sum of its binary digits is even.

The product of its digits is 645120, while the sum is 46.

The square root of 388728523 is about 19716.1995070044. The cubic root of 388728523 is about 729.8195106421.

The spelling of 388728523 in words is "three hundred eighty-eight million, seven hundred twenty-eight thousand, five hundred twenty-three".