389513880 has 256 divisors, whose sum is σ = 1507968000. Its totient is φ = 87588864.

The previous prime is 389513867. The next prime is 389513893. The reversal of 389513880 is 88315983.

It is an interprime number because it is at equal distance from previous prime (389513867) and next prime (389513893).

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 polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 506136 + ... + 506904.

It is an arithmetic number, because the mean of its divisors is an integer number (5890500).

Almost surely, 2^389513880 is an apocalyptic number.

389513880 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 389513880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (753984000).

389513880 is an abundant number, since it is smaller than the sum of its proper divisors (1118454120).

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

389513880 is a wasteful number, since it uses less digits than its factorization.

389513880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 863 (or 853 counting only the distinct ones).

The product of its (nonzero) digits is 207360, while the sum is 45.

The square root of 389513880 is about 19736.1059989046. The cubic root of 389513880 is about 730.3106702946.

The spelling of 389513880 in words is "three hundred eighty-nine million, five hundred thirteen thousand, eight hundred eighty".