388274081 has 4 divisors (see below), whose sum is σ = 418141332. Its totient is φ = 358406832.

The previous prime is 388274071. The next prime is 388274093. The reversal of 388274081 is 180472883.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 169234081 + 219040000 = 13009^2 + 14800^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-388274081 is a prime.

It is a super-2 number, since 2×388274081² = 301513523952789122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (388274071) 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, 14933606 + ... + 14933631.

It is an arithmetic number, because the mean of its divisors is an integer number (104535333).

Almost surely, 2^388274081 is an apocalyptic number.

It is an amenable number.

388274081 is a deficient number, since it is larger than the sum of its proper divisors (29867251).

388274081 is a wasteful number, since it uses less digits than its factorization.

388274081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29867250.

The product of its (nonzero) digits is 86016, while the sum is 41.

The square root of 388274081 is about 19704.6715527055. The cubic root of 388274081 is about 729.5350019214.

The spelling of 388274081 in words is "three hundred eighty-eight million, two hundred seventy-four thousand, eighty-one".