388171072 has 28 divisors (see below), whose sum is σ = 771730740. Its totient is φ = 193719296.

The previous prime is 388171051. The next prime is 388171079. The reversal of 388171072 is 270171883.

It can be written as a sum of positive squares in 2 ways, for example, as 21678336 + 366492736 = 4656^2 + 19144^2 .

It is a super-2 number, since 2×388171072² = 301353562275258368, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (388171079) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 30204 + ... + 41092.

Almost surely, 2^388171072 is an apocalyptic number.

388171072 is a gapful number since it is divisible by the number (32) formed by its first and last digit.

It is an amenable number.

388171072 is a deficient number, since it is larger than the sum of its proper divisors (383559668).

388171072 is a wasteful number, since it uses less digits than its factorization.

388171072 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11458 (or 11448 counting only the distinct ones).

The product of its (nonzero) digits is 18816, while the sum is 37.

The square root of 388171072 is about 19702.0575575243. The cubic root of 388171072 is about 729.4704810745.

The spelling of 388171072 in words is "three hundred eighty-eight million, one hundred seventy-one thousand, seventy-two".