47421590 has 32 divisors (see below), whose sum is σ = 87851520. Its totient is φ = 18421344.

The previous prime is 47421589. The next prime is 47421593. The reversal of 47421590 is 9512474.

It is a happy number.

47421590 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (47421593) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 76301 + ... + 76919.

It is an arithmetic number, because the mean of its divisors is an integer number (2745360).

Almost surely, 2^47421590 is an apocalyptic number.

47421590 is a deficient number, since it is larger than the sum of its proper divisors (40429930).

47421590 is a wasteful number, since it uses less digits than its factorization.

47421590 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 836.

The product of its (nonzero) digits is 10080, while the sum is 32.

The square root of 47421590 is about 6886.3335672911. Note that the first 3 decimals coincide. The cubic root of 47421590 is about 361.9584366676.

The spelling of 47421590 in words is "forty-seven million, four hundred twenty-one thousand, five hundred ninety".