Search a number
-
+
388272384 = 28321723431
BaseRepresentation
bin10111001001001…
…001000100000000
31000001121021120200
4113021021010000
51243344204014
6102310005200
712423155313
oct2711110400
91001537520
10388272384
1118a195875
12aa046800
1362596596
14397d097a
1524148a09
hex17249100

388272384 has 216 divisors, whose sum is σ = 1239743232. Its totient is φ = 116244480.

The previous prime is 388272383. The next prime is 388272389. The reversal of 388272384 is 483272883.

It is not an unprimeable number, because it can be changed into a prime (388272383) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 900649 + ... + 901079.

It is an arithmetic number, because the mean of its divisors is an integer number (5739552).

Almost surely, 2388272384 is an apocalyptic number.

388272384 is a gapful number since it is divisible by the number (34) 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 388272384, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (619871616).

388272384 is an abundant number, since it is smaller than the sum of its proper divisors (851470848).

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

388272384 is a wasteful number, since it uses less digits than its factorization.

388272384 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 493 (or 476 counting only the distinct ones).

The product of its digits is 516096, while the sum is 45.

The square root of 388272384 is about 19704.6284918036. The cubic root of 388272384 is about 729.5339390788.

The spelling of 388272384 in words is "three hundred eighty-eight million, two hundred seventy-two thousand, three hundred eighty-four".