47147440 has 40 divisors (see below), whose sum is σ = 110305440. Its totient is φ = 18740736.

The previous prime is 47147383. The next prime is 47147459. The reversal of 47147440 is 4474174.

It is a tau number, because it is divible by the number of its divisors (40).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11596 + ... + 15124.

It is an arithmetic number, because the mean of its divisors is an integer number (2757636).

Almost surely, 2^47147440 is an apocalyptic number.

47147440 is a gapful number since it is divisible by the number (40) 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 47147440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (55152720).

47147440 is an abundant number, since it is smaller than the sum of its proper divisors (63158000).

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

47147440 is a wasteful number, since it uses less digits than its factorization.

47147440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3709 (or 3703 counting only the distinct ones).

The product of its (nonzero) digits is 12544, while the sum is 31.

The square root of 47147440 is about 6866.3993475474. The cubic root of 47147440 is about 361.2595795722.

The spelling of 47147440 in words is "forty-seven million, one hundred forty-seven thousand, four hundred forty".