388500100 has 18 divisors (see below), whose sum is σ = 843045434. Its totient is φ = 155400000.

The previous prime is 388500023. The next prime is 388500109. The reversal of 388500100 is 1005883.

It can be written as a sum of positive squares in 3 ways, for example, as 44916804 + 343583296 = 6702^2 + 18536^2 .

It is a Harshad number since it is a multiple of its sum of digits (25).

It is not an unprimeable number, because it can be changed into a prime (388500109) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1942401 + ... + 1942600.

Almost surely, 2^388500100 is an apocalyptic number.

It is an amenable number.

388500100 is an abundant number, since it is smaller than the sum of its proper divisors (454545334).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

388500100 is a wasteful number, since it uses less digits than its factorization.

388500100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3885015 (or 3885008 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 25.

The square root of 388500100 is about 19710.4058811583. The cubic root of 388500100 is about 729.6765314881.

Adding to 388500100 its reverse (1005883), we get a palindrome (389505983).

The spelling of 388500100 in words is "three hundred eighty-eight million, five hundred thousand, one hundred".