47185940 has 24 divisors (see below), whose sum is σ = 100717512. Its totient is φ = 18564480.

The previous prime is 47185907. The next prime is 47185967. The reversal of 47185940 is 4958174.

It can be written as a sum of positive squares in 4 ways, for example, as 3678724 + 43507216 = 1918^2 + 6596^2 .

It is a junction number, because it is equal to n+sod(n) for n = 47185894 and 47185903.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18119 + ... + 20558.

It is an arithmetic number, because the mean of its divisors is an integer number (4196563).

Almost surely, 2^47185940 is an apocalyptic number.

It is an amenable number.

47185940 is an abundant number, since it is smaller than the sum of its proper divisors (53531572).

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

47185940 is a wasteful number, since it uses less digits than its factorization.

47185940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38747 (or 38745 counting only the distinct ones).

The product of its (nonzero) digits is 40320, while the sum is 38.

The square root of 47185940 is about 6869.2022826526. The cubic root of 47185940 is about 361.3578861448.

The spelling of 47185940 in words is "forty-seven million, one hundred eighty-five thousand, nine hundred forty".