388281081 has 4 divisors (see below), whose sum is σ = 517708112. Its totient is φ = 258854052.

The previous prime is 388281041. The next prime is 388281097. The reversal of 388281081 is 180182883.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 180182883 = 3 ⋅60060961.

It is not a de Polignac number, because 388281081 - 2¹¹ = 388279033 is a prime.

It is a super-2 number, since 2×388281081² = 301524395725057122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (388281011) 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, 64713511 + ... + 64713516.

It is an arithmetic number, because the mean of its divisors is an integer number (129427028).

Almost surely, 2^388281081 is an apocalyptic number.

It is an amenable number.

388281081 is a deficient number, since it is larger than the sum of its proper divisors (129427031).

388281081 is a wasteful number, since it uses less digits than its factorization.

388281081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 129427030.

The product of its (nonzero) digits is 24576, while the sum is 39.

The square root of 388281081 is about 19704.8491747590. The cubic root of 388281081 is about 729.5393860361.

The spelling of 388281081 in words is "three hundred eighty-eight million, two hundred eighty-one thousand, eighty-one".