47621138 has 8 divisors (see below), whose sum is σ = 72064188. Its totient is φ = 23599744.

The previous prime is 47621137. The next prime is 47621143. The reversal of 47621138 is 83112674.

It can be written as a sum of positive squares in 2 ways, for example, as 28058209 + 19562929 = 5297^2 + 4423^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (47621137) 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, 105131 + ... + 105582.

Almost surely, 2^47621138 is an apocalyptic number.

47621138 is a deficient number, since it is larger than the sum of its proper divisors (24443050).

47621138 is a wasteful number, since it uses less digits than its factorization.

47621138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 210828.

The product of its digits is 8064, while the sum is 32.

The square root of 47621138 is about 6900.8070542510. The cubic root of 47621138 is about 362.4654280149.

The spelling of 47621138 in words is "forty-seven million, six hundred twenty-one thousand, one hundred thirty-eight".