388407 has 4 divisors (see below), whose sum is σ = 517880. Its totient is φ = 258936.

The previous prime is 388403. The next prime is 388459. The reversal of 388407 is 704883.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 704883 = 3 ⋅234961.

It is not a de Polignac number, because 388407 - 2² = 388403 is a prime.

It is a D-number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (388403) 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 3 ways as a sum of consecutive naturals, for example, 64732 + ... + 64737.

It is an arithmetic number, because the mean of its divisors is an integer number (129470).

2³⁸⁸⁴⁰⁷ is an apocalyptic number.

388407 is a deficient number, since it is larger than the sum of its proper divisors (129473).

388407 is a wasteful number, since it uses less digits than its factorization.

388407 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 129472.

The product of its (nonzero) digits is 5376, while the sum is 30.

The square root of 388407 is about 623.2230740273. The cubic root of 388407 is about 72.9618240373.

It can be divided in two parts, 3 and 88407, that added together give a triangular number (88410 = T₄₂₀).

The spelling of 388407 in words is "three hundred eighty-eight thousand, four hundred seven".