389771424 has 144 divisors (see below), whose sum is σ = 1272555648. Its totient is φ = 110854656.

The previous prime is 389771419. The next prime is 389771443. The reversal of 389771424 is 424177983.

It is a tau number, because it is divible by the number of its divisors (144).

It is a nude number because it is divisible by every one of its digits.

Its product of digits (338688) is a multiple of the sum of its prime divisors (896).

It is a self number, because there is not a number n which added to its sum of digits gives 389771424.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 800109 + ... + 800595.

It is an arithmetic number, because the mean of its divisors is an integer number (8837192).

Almost surely, 2^389771424 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 389771424, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (636277824).

389771424 is an abundant number, since it is smaller than the sum of its proper divisors (882784224).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

389771424 is a wasteful number, since it uses less digits than its factorization.

389771424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 907 (or 896 counting only the distinct ones).

The product of its digits is 338688, while the sum is 45.

The square root of 389771424 is about 19742.6296120856. The cubic root of 389771424 is about 730.4715936935.

It can be divided in two parts, 38977 and 1424, that added together give a square (40401 = 201²).

The spelling of 389771424 in words is "three hundred eighty-nine million, seven hundred seventy-one thousand, four hundred twenty-four".