47720540 has 48 divisors (see below), whose sum is σ = 117207552. Its totient is φ = 15978816.

The previous prime is 47720539. The next prime is 47720551. The reversal of 47720540 is 4502774.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2057 + ... + 9983.

It is an arithmetic number, because the mean of its divisors is an integer number (2441824).

Almost surely, 2^47720540 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 47720540, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (58603776).

47720540 is an abundant number, since it is smaller than the sum of its proper divisors (69487012).

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

47720540 is a wasteful number, since it uses less digits than its factorization.

47720540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7986 (or 7984 counting only the distinct ones).

The product of its (nonzero) digits is 7840, while the sum is 29.

The square root of 47720540 is about 6908.0055008664. The cubic root of 47720540 is about 362.7174501916.

The spelling of 47720540 in words is "forty-seven million, seven hundred twenty thousand, five hundred forty".