388678641 has 32 divisors (see below), whose sum is σ = 570796800. Its totient is φ = 233798400.

The previous prime is 388678601. The next prime is 388678643. The reversal of 388678641 is 146876883.

It is not a de Polignac number, because 388678641 - 2⁷ = 388678513 is a prime.

It is not an unprimeable number, because it can be changed into a prime (388678643) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 473011 + ... + 473831.

It is an arithmetic number, because the mean of its divisors is an integer number (17837400).

Almost surely, 2^388678641 is an apocalyptic number.

It is an amenable number.

388678641 is a deficient number, since it is larger than the sum of its proper divisors (182118159).

388678641 is a wasteful number, since it uses less digits than its factorization.

388678641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1097.

The product of its digits is 1548288, while the sum is 51.

The square root of 388678641 is about 19714.9344660336. The cubic root of 388678641 is about 729.7882922708.

The spelling of 388678641 in words is "three hundred eighty-eight million, six hundred seventy-eight thousand, six hundred forty-one".