389936430 has 160 divisors (see below), whose sum is σ = 1189188000. Its totient is φ = 90885888.

The previous prime is 389936401. The next prime is 389936441. The reversal of 389936430 is 34639983.

It is a super-2 number, since 2×389936430² = 304100838882289800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 199096 + ... + 201044.

It is an arithmetic number, because the mean of its divisors is an integer number (7432425).

Almost surely, 2^389936430 is an apocalyptic number.

389936430 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 389936430, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (594594000).

389936430 is an abundant number, since it is smaller than the sum of its proper divisors (799251570).

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

389936430 is a wasteful number, since it uses less digits than its factorization.

389936430 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2000 (or 1991 counting only the distinct ones).

The product of its (nonzero) digits is 419904, while the sum is 45.

The square root of 389936430 is about 19746.8080965001. The cubic root of 389936430 is about 730.5746585358.

The spelling of 389936430 in words is "three hundred eighty-nine million, nine hundred thirty-six thousand, four hundred thirty".