388923 has 4 divisors (see below), whose sum is σ = 518568. Its totient is φ = 259280.

The previous prime is 388903. The next prime is 388931. The reversal of 388923 is 329883.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 329883 = 3 ⋅109961.

It is a cyclic number.

It is not a de Polignac number, because 388923 - 2⁵ = 388891 is a prime.

It is a super-2 number, since 2×388923² = 302522199858, which contains 22 as substring.

It is a D-number.

388923 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (388903) 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, 64818 + ... + 64823.

It is an arithmetic number, because the mean of its divisors is an integer number (129642).

2³⁸⁸⁹²³ is an apocalyptic number.

388923 is a deficient number, since it is larger than the sum of its proper divisors (129645).

388923 is a wasteful number, since it uses less digits than its factorization.

388923 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 129644.

The product of its digits is 10368, while the sum is 33.

The square root of 388923 is about 623.6369135964. The cubic root of 388923 is about 72.9941197490.

The spelling of 388923 in words is "three hundred eighty-eight thousand, nine hundred twenty-three".