2447881920 has 168 divisors, whose sum is σ = 9185239440. Its totient is φ = 593418240.

The previous prime is 2447881897. The next prime is 2447881921. The reversal of 2447881920 is 291887442.

2447881920 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is not an unprimeable number, because it can be changed into a prime (2447881921) 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, 6955 + ... + 70314.

Almost surely, 2^2447881920 is an apocalyptic number.

2447881920 is a gapful number since it is divisible by the number (20) 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 2447881920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4592619720).

2447881920 is an abundant number, since it is smaller than the sum of its proper divisors (6737357520).

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

2447881920 is a wasteful number, since it uses less digits than its factorization.

2447881920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77303 (or 77290 counting only the distinct ones).

The product of its (nonzero) digits is 258048, while the sum is 45.

The square root of 2447881920 is about 49476.0742177469. The cubic root of 2447881920 is about 1347.7111503830.

The spelling of 2447881920 in words is "two billion, four hundred forty-seven million, eight hundred eighty-one thousand, nine hundred twenty".