389308500 has 288 divisors, whose sum is σ = 1488195072. Its totient is φ = 83635200.

The previous prime is 389308463. The next prime is 389308501. The reversal of 389308500 is 5803983.

It is a super-2 number, since 2×389308500² = 303122216344500000, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (389308501) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 535137 + ... + 535863.

It is an arithmetic number, because the mean of its divisors is an integer number (5167344).

Almost surely, 2^389308500 is an apocalyptic number.

389308500 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 389308500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (744097536).

389308500 is an abundant number, since it is smaller than the sum of its proper divisors (1098886572).

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

389308500 is a wasteful number, since it uses less digits than its factorization.

389308500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 776 (or 761 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 36.

The square root of 389308500 is about 19730.9021587965. The cubic root of 389308500 is about 730.1822901238.

The spelling of 389308500 in words is "three hundred eighty-nine million, three hundred eight thousand, five hundred".