47109720 has 128 divisors (see below), whose sum is σ = 171072000. Its totient is φ = 10131456.

The previous prime is 47109679. The next prime is 47109731. The reversal of 47109720 is 2790174.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 12631 + ... + 15929.

It is an arithmetic number, because the mean of its divisors is an integer number (1336500).

Almost surely, 2^47109720 is an apocalyptic number.

47109720 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 47109720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (85536000).

47109720 is an abundant number, since it is smaller than the sum of its proper divisors (123962280).

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

47109720 is a wasteful number, since it uses less digits than its factorization.

47109720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3337 (or 3333 counting only the distinct ones).

The product of its (nonzero) digits is 3528, while the sum is 30.

The square root of 47109720 is about 6863.6520890849. The cubic root of 47109720 is about 361.1632127497.

Adding to 47109720 its reverse (2790174), we get a palindrome (49899894).

The spelling of 47109720 in words is "forty-seven million, one hundred nine thousand, seven hundred twenty".