389191872 has 56 divisors (see below), whose sum is σ = 1035777456. Its totient is φ = 128969728.

The previous prime is 389191843. The next prime is 389191883. The reversal of 389191872 is 278191983.

It is a super-3 number, since 3×389191872³ (a number of 27 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 27358 + ... + 39074.

It is an arithmetic number, because the mean of its divisors is an integer number (18496026).

Almost surely, 2^389191872 is an apocalyptic number.

389191872 is a gapful number since it is divisible by the number (32) 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 389191872, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (517888728).

389191872 is an abundant number, since it is smaller than the sum of its proper divisors (646585584).

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

389191872 is a wasteful number, since it uses less digits than its factorization.

389191872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11905 (or 11895 counting only the distinct ones).

The product of its digits is 217728, while the sum is 48.

The square root of 389191872 is about 19727.9464719468. The cubic root of 389191872 is about 730.1093674883.

The spelling of 389191872 in words is "three hundred eighty-nine million, one hundred ninety-one thousand, eight hundred seventy-two".