388109672 has 16 divisors (see below), whose sum is σ = 741436740. Its totient is φ = 190393216.

The previous prime is 388109663. The next prime is 388109693. The reversal of 388109672 is 276901883.

It can be written as a sum of positive squares in 2 ways, for example, as 387853636 + 256036 = 19694^2 + 506^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 457253 + ... + 458100.

Almost surely, 2^388109672 is an apocalyptic number.

It is an amenable number.

388109672 is a deficient number, since it is larger than the sum of its proper divisors (353327068).

388109672 is a wasteful number, since it uses less digits than its factorization.

388109672 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 915412 (or 915408 counting only the distinct ones).

The product of its (nonzero) digits is 145152, while the sum is 44.

The square root of 388109672 is about 19700.4992830131. The cubic root of 388109672 is about 729.4320170633.

The spelling of 388109672 in words is "three hundred eighty-eight million, one hundred nine thousand, six hundred seventy-two".