388402 has 8 divisors (see below), whose sum is σ = 665856. Its totient is φ = 166452.

The previous prime is 388391. The next prime is 388403. The reversal of 388402 is 204883.

388402 = 104² + 105² + ... + 131².

388402 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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

It is a super-2 number, since 2×388402² = 301712227208, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (388403) by changing a digit.

388402 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13858 + ... + 13885.

It is an arithmetic number, because the mean of its divisors is an integer number (83232).

2³⁸⁸⁴⁰² is an apocalyptic number.

388402 is a deficient number, since it is larger than the sum of its proper divisors (277454).

388402 is a wasteful number, since it uses less digits than its factorization.

388402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27752.

The product of its (nonzero) digits is 1536, while the sum is 25.

The square root of 388402 is about 623.2190626096. The cubic root of 388402 is about 72.9615109545.

The spelling of 388402 in words is "three hundred eighty-eight thousand, four hundred two".