47211940 has 12 divisors (see below), whose sum is σ = 99145116. Its totient is φ = 18884768.

The previous prime is 47211911. The next prime is 47211943. The reversal of 47211940 is 4911274.

It can be written as a sum of positive squares in 2 ways, for example, as 19838116 + 27373824 = 4454^2 + 5232^2 .

It is a junction number, because it is equal to n+sod(n) for n = 47211899 and 47211908.

It is not an unprimeable number, because it can be changed into a prime (47211943) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 1180279 + ... + 1180318.

It is an arithmetic number, because the mean of its divisors is an integer number (8262093).

Almost surely, 2^47211940 is an apocalyptic number.

It is an amenable number.

47211940 is an abundant number, since it is smaller than the sum of its proper divisors (51933176).

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

47211940 is a wasteful number, since it uses less digits than its factorization.

47211940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2360606 (or 2360604 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 28.

The square root of 47211940 is about 6871.0945270750. The cubic root of 47211940 is about 361.4242447531.

The spelling of 47211940 in words is "forty-seven million, two hundred eleven thousand, nine hundred forty".