388634197 has 16 divisors (see below), whose sum is σ = 478420992. Its totient is φ = 308349360.

The previous prime is 388634179. The next prime is 388634209. The reversal of 388634197 is 791436883.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 388634197 - 2²³ = 380245589 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 388634197.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (388634177) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 33943 + ... + 43924.

It is an arithmetic number, because the mean of its divisors is an integer number (29901312).

Almost surely, 2^388634197 is an apocalyptic number.

It is an amenable number.

388634197 is a deficient number, since it is larger than the sum of its proper divisors (89786795).

388634197 is a wasteful number, since it uses less digits than its factorization.

388634197 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77928.

The product of its digits is 870912, while the sum is 49.

The square root of 388634197 is about 19713.8072680038. The cubic root of 388634197 is about 729.7604749913.

It can be divided in two parts, 3886 and 34197, that added together give a palindrome (38083).

The spelling of 388634197 in words is "three hundred eighty-eight million, six hundred thirty-four thousand, one hundred ninety-seven".