388788401 has 4 divisors (see below), whose sum is σ = 393156900. Its totient is φ = 384419904.

The previous prime is 388788383. The next prime is 388788427. The reversal of 388788401 is 104887883.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 104887883 = 7411 ⋅14153.

It can be written as a sum of positive squares in 2 ways, for example, as 138674176 + 250114225 = 11776^2 + 15815^2 .

It is a cyclic number.

It is not a de Polignac number, because 388788401 - 2¹⁴ = 388772017 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (388788451) 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, 2184116 + ... + 2184293.

It is an arithmetic number, because the mean of its divisors is an integer number (98289225).

Almost surely, 2^388788401 is an apocalyptic number.

It is an amenable number.

388788401 is a deficient number, since it is larger than the sum of its proper divisors (4368499).

388788401 is an equidigital number, since it uses as much as digits as its factorization.

388788401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4368498.

The product of its (nonzero) digits is 344064, while the sum is 47.

The square root of 388788401 is about 19717.7179460505. The cubic root of 388788401 is about 729.8569814274.

The spelling of 388788401 in words is "three hundred eighty-eight million, seven hundred eighty-eight thousand, four hundred one".