388638425 has 24 divisors (see below), whose sum is σ = 569755200. Its totient is φ = 257302080.

The previous prime is 388638421. The next prime is 388638431. The reversal of 388638425 is 524836883.

It is a happy number.

It is not a de Polignac number, because 388638425 - 2² = 388638421 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 388638425.

It is not an unprimeable number, because it can be changed into a prime (388638421) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 33215 + ... + 43364.

It is an arithmetic number, because the mean of its divisors is an integer number (23739800).

Almost surely, 2^388638425 is an apocalyptic number.

388638425 is a gapful number since it is divisible by the number (35) formed by its first and last digit.

It is an amenable number.

388638425 is a deficient number, since it is larger than the sum of its proper divisors (181116775).

388638425 is a wasteful number, since it uses less digits than its factorization.

388638425 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 76625 (or 76620 counting only the distinct ones).

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

The square root of 388638425 is about 19713.9145021987. The cubic root of 388638425 is about 729.7631213668.

The spelling of 388638425 in words is "three hundred eighty-eight million, six hundred thirty-eight thousand, four hundred twenty-five".