388850405 has 4 divisors (see below), whose sum is σ = 466620492. Its totient is φ = 311080320.

The previous prime is 388850393. The next prime is 388850431. The reversal of 388850405 is 504058883.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 504058883 = 941 ⋅535663.

It can be written as a sum of positive squares in 2 ways, for example, as 187607809 + 201242596 = 13697^2 + 14186^2 .

It is not a de Polignac number, because 388850405 - 2⁸ = 388850149 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 38885036 + ... + 38885045.

It is an arithmetic number, because the mean of its divisors is an integer number (116655123).

Almost surely, 2^388850405 is an apocalyptic number.

It is an amenable number.

388850405 is a deficient number, since it is larger than the sum of its proper divisors (77770087).

388850405 is an equidigital number, since it uses as much as digits as its factorization.

388850405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77770086.

The product of its (nonzero) digits is 153600, while the sum is 41.

The square root of 388850405 is about 19719.2901748516. The cubic root of 388850405 is about 729.8957785783.

The spelling of 388850405 in words is "three hundred eighty-eight million, eight hundred fifty thousand, four hundred five".