47409840 has 160 divisors (see below), whose sum is σ = 167132160. Its totient is φ = 12347136.

The previous prime is 47409833. The next prime is 47409841. The reversal of 47409840 is 4890474.

47409840 is digitally balanced in base 2, because in such base 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 (36).

It is a junction number, because it is equal to n+sod(n) for n = 47409795 and 47409804.

It is not an unprimeable number, because it can be changed into a prime (47409841) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 101287 + ... + 101753.

It is an arithmetic number, because the mean of its divisors is an integer number (1044576).

Almost surely, 2^47409840 is an apocalyptic number.

47409840 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 47409840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (83566080).

47409840 is an abundant number, since it is smaller than the sum of its proper divisors (119722320).

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

47409840 is a wasteful number, since it uses less digits than its factorization.

47409840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 536 (or 524 counting only the distinct ones).

The product of its (nonzero) digits is 32256, while the sum is 36.

The square root of 47409840 is about 6885.4803753987. The cubic root of 47409840 is about 361.9285391536.

The spelling of 47409840 in words is "forty-seven million, four hundred nine thousand, eight hundred forty".