388262561 has 8 divisors (see below), whose sum is σ = 391473000. Its totient is φ = 385060480.

The previous prime is 388262533. The next prime is 388262591. The reversal of 388262561 is 165262883.

It can be written as a sum of positive squares in 4 ways, for example, as 100620961 + 287641600 = 10031^2 + 16960^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-388262561 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (388262531) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 118931 + ... + 122151.

It is an arithmetic number, because the mean of its divisors is an integer number (48934125).

Almost surely, 2^388262561 is an apocalyptic number.

It is an amenable number.

388262561 is a deficient number, since it is larger than the sum of its proper divisors (3210439).

388262561 is a wasteful number, since it uses less digits than its factorization.

388262561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4179.

The product of its digits is 138240, while the sum is 41.

The square root of 388262561 is about 19704.3792340688. The cubic root of 388262561 is about 729.5277868065.

The spelling of 388262561 in words is "three hundred eighty-eight million, two hundred sixty-two thousand, five hundred sixty-one".