389423040 has 112 divisors (see below), whose sum is σ = 1242559872. Its totient is φ = 103330816.

The previous prime is 389423033. The next prime is 389423057. The reversal of 389423040 is 40324983.

It is a junction number, because it is equal to n+sod(n) for n = 389422992 and 389423010.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 217027 + ... + 218813.

Almost surely, 2^389423040 is an apocalyptic number.

389423040 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 389423040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (621279936).

389423040 is an abundant number, since it is smaller than the sum of its proper divisors (853136832).

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

389423040 is a wasteful number, since it uses less digits than its factorization.

389423040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2034 (or 2024 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 33.

The square root of 389423040 is about 19733.8044988796. The cubic root of 389423040 is about 730.2538930459.

The spelling of 389423040 in words is "three hundred eighty-nine million, four hundred twenty-three thousand, forty".