47017440 has 144 divisors (see below), whose sum is σ = 162515808. Its totient is φ = 12377088.

The previous prime is 47017423. The next prime is 47017489. The reversal of 47017440 is 4471074.

It is a tau number, because it is divible by the number of its divisors (144).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 148162 + ... + 148478.

It is an arithmetic number, because the mean of its divisors is an integer number (1128582).

Almost surely, 2^47017440 is an apocalyptic number.

47017440 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 47017440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (81257904).

47017440 is an abundant number, since it is smaller than the sum of its proper divisors (115498368).

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

47017440 is a wasteful number, since it uses less digits than its factorization.

47017440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 441 (or 430 counting only the distinct ones).

The product of its (nonzero) digits is 3136, while the sum is 27.

The square root of 47017440 is about 6856.9264251558. The cubic root of 47017440 is about 360.9272393215.

The spelling of 47017440 in words is "forty-seven million, seventeen thousand, four hundred forty".