47990438 has 4 divisors (see below), whose sum is σ = 71985660. Its totient is φ = 23995218.

The previous prime is 47990417. The next prime is 47990461. The reversal of 47990438 is 83409974.

47990438 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 11997608 + ... + 11997611.

It is an arithmetic number, because the mean of its divisors is an integer number (17996415).

Almost surely, 2^47990438 is an apocalyptic number.

47990438 is a deficient number, since it is larger than the sum of its proper divisors (23995222).

47990438 is a wasteful number, since it uses less digits than its factorization.

47990438 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23995221.

The product of its (nonzero) digits is 217728, while the sum is 44.

The square root of 47990438 is about 6927.5131179955. The cubic root of 47990438 is about 363.3999845928.

The spelling of 47990438 in words is "forty-seven million, nine hundred ninety thousand, four hundred thirty-eight".