388411989 has 32 divisors (see below), whose sum is σ = 612581376. Its totient is φ = 214220160.

The previous prime is 388411979. The next prime is 388411997. The reversal of 388411989 is 989114883.

It is not a de Polignac number, because 388411989 - 2⁴ = 388411973 is a prime.

It is a super-2 number, since 2×388411989² = 301727746397872242, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (388411939) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 401184 + ... + 402150.

It is an arithmetic number, because the mean of its divisors is an integer number (19143168).

Almost surely, 2^388411989 is an apocalyptic number.

It is an amenable number.

388411989 is a deficient number, since it is larger than the sum of its proper divisors (224169387).

388411989 is a wasteful number, since it uses less digits than its factorization.

388411989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1625.

The product of its digits is 497664, while the sum is 51.

The square root of 388411989 is about 19708.1706152550. The cubic root of 388411989 is about 729.6213642866.

The spelling of 388411989 in words is "three hundred eighty-eight million, four hundred eleven thousand, nine hundred eighty-nine".