388728547 has 2 divisors, whose sum is σ = 388728548. Its totient is φ = 388728546.

The previous prime is 388728523. The next prime is 388728583. The reversal of 388728547 is 745827883.

It is a weak prime.

It is an emirp because it is prime and its reverse (745827883) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-388728547 is a prime.

It is a super-2 number, since 2×388728547² = 302219766505462418, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 388728494 and 388728503.

It is not a weakly prime, because it can be changed into another prime (388728247) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 194364273 + 194364274.

It is an arithmetic number, because the mean of its divisors is an integer number (194364274).

Almost surely, 2^388728547 is an apocalyptic number.

388728547 is a deficient number, since it is larger than the sum of its proper divisors (1).

388728547 is an equidigital number, since it uses as much as digits as its factorization.

388728547 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3010560, while the sum is 52.

The square root of 388728547 is about 19716.2001156409. The cubic root of 388728547 is about 729.8195256617.

The spelling of 388728547 in words is "three hundred eighty-eight million, seven hundred twenty-eight thousand, five hundred forty-seven".