9147841920 has 448 divisors, whose sum is σ = 37486052640. Its totient is φ = 2090188800.

The previous prime is 9147841909. The next prime is 9147841921. The reversal of 9147841920 is 291487419.

It is a happy number.

9147841920 is a `hidden beast` number, since 91 + 478 + 4 + 1 + 92 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (448).

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9147841921) by changing a digit.

It is a polite number, since it can be written in 55 ways as a sum of consecutive naturals, for example, 3264520 + ... + 3267320.

Almost surely, 2^9147841920 is an apocalyptic number.

9147841920 is a gapful number since it is divisible by the number (90) 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 9147841920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (18743026320).

9147841920 is an abundant number, since it is smaller than the sum of its proper divisors (28338210720).

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

9147841920 is an equidigital number, since it uses as much as digits as its factorization.

9147841920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2845 (or 2818 counting only the distinct ones).

The product of its (nonzero) digits is 145152, while the sum is 45.

The square root of 9147841920 is about 95644.3512184593. The cubic root of 9147841920 is about 2091.4117824122.

The spelling of 9147841920 in words is "nine billion, one hundred forty-seven million, eight hundred forty-one thousand, nine hundred twenty".