47017840 has 80 divisors (see below), whose sum is σ = 113305248. Its totient is φ = 18137088.

The previous prime is 47017807. The next prime is 47017843. The reversal of 47017840 is 4871074.

It is a tau number, because it is divible by the number of its divisors (80).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (47017843) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 484672 + ... + 484768.

Almost surely, 2^47017840 is an apocalyptic number.

47017840 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 47017840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (56652624).

47017840 is an abundant number, since it is smaller than the sum of its proper divisors (66287408).

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

47017840 is a wasteful number, since it uses less digits than its factorization.

47017840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 266 (or 260 counting only the distinct ones).

The product of its (nonzero) digits is 6272, while the sum is 31.

The square root of 47017840 is about 6856.9555926811. The cubic root of 47017840 is about 360.9282628459.

The spelling of 47017840 in words is "forty-seven million, seventeen thousand, eight hundred forty".