Search a number
-
+
6872831808 = 263174771631
BaseRepresentation
bin1100110011010011…
…10001011101000000
3122201222110000211020
412121221301131000
5103033421104213
63053552345440
7332213051343
oct63151613500
918658400736
106872831808
112a07597297
1213b9845280
13856b6c3ab
14492ad645a
152a3599923
hex199a71740

6872831808 has 224 divisors, whose sum is σ = 19972251648. Its totient is φ = 2077286400.

The previous prime is 6872831803. The next prime is 6872831821. The reversal of 6872831808 is 8081382786.

It is a super-2 number, since 2×68728318082 = 94471634122113097728, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (51).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6872831803) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 10891653 + ... + 10892283.

Almost surely, 26872831808 is an apocalyptic number.

6872831808 is a gapful number since it is divisible by the number (68) 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 6872831808, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (9986125824).

6872831808 is an abundant number, since it is smaller than the sum of its proper divisors (13099419840).

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

6872831808 is a wasteful number, since it uses less digits than its factorization.

6872831808 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 781 (or 771 counting only the distinct ones).

The product of its (nonzero) digits is 1032192, while the sum is 51.

The square root of 6872831808 is about 82902.5440381657. The cubic root of 6872831808 is about 1901.2763177004.

The spelling of 6872831808 in words is "six billion, eight hundred seventy-two million, eight hundred thirty-one thousand, eight hundred eight".