8427781120 has 176 divisors, whose sum is σ = 22223149056. Its totient is φ = 3041280000.

The previous prime is 8427781099. The next prime is 8427781121. The reversal of 8427781120 is 211877248.

It is a tau number, because it is divible by the number of its divisors (176).

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8427781121) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8503825 + ... + 8504815.

Almost surely, 2^8427781120 is an apocalyptic number.

8427781120 is a gapful number since it is divisible by the number (80) 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 8427781120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (11111574528).

8427781120 is an abundant number, since it is smaller than the sum of its proper divisors (13795367936).

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

8427781120 is a wasteful number, since it uses less digits than its factorization.

8427781120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1178 (or 1160 counting only the distinct ones).

The product of its (nonzero) digits is 50176, while the sum is 40.

The square root of 8427781120 is about 91802.9472293782. The cubic root of 8427781120 is about 2035.0312499352.

The spelling of 8427781120 in words is "eight billion, four hundred twenty-seven million, seven hundred eighty-one thousand, one hundred twenty".