47421440 has 96 divisors (see below), whose sum is σ = 124422480. Its totient is φ = 17203200.

The previous prime is 47421433. The next prime is 47421443. The reversal of 47421440 is 4412474.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (47421443) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 112430 + ... + 112850.

Almost surely, 2^47421440 is an apocalyptic number.

47421440 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 47421440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (62211240).

47421440 is an abundant number, since it is smaller than the sum of its proper divisors (77001040).

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

47421440 is a wasteful number, since it uses less digits than its factorization.

47421440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 459 (or 439 counting only the distinct ones).

The product of its (nonzero) digits is 3584, while the sum is 26.

The square root of 47421440 is about 6886.3226761458. The cubic root of 47421440 is about 361.9580550283.

The spelling of 47421440 in words is "forty-seven million, four hundred twenty-one thousand, four hundred forty".