47890989 has 24 divisors (see below), whose sum is σ = 74089080. Its totient is φ = 29703168.

The previous prime is 47890967. The next prime is 47891021. The reversal of 47890989 is 98909874.

47890989 is a `hidden beast` number, since 478 + 90 + 9 + 89 = 666.

47890989 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 18275625 + 29615364 = 4275^2 + 5442^2 .

It is not a de Polignac number, because 47890989 - 2¹¹ = 47888941 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (47890289) 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 23 ways as a sum of consecutive naturals, for example, 11859 + ... + 15375.

It is an arithmetic number, because the mean of its divisors is an integer number (3087045).

Almost surely, 2^47890989 is an apocalyptic number.

It is an amenable number.

47890989 is a deficient number, since it is larger than the sum of its proper divisors (26198091).

47890989 is a wasteful number, since it uses less digits than its factorization.

47890989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3629 (or 3626 counting only the distinct ones).

The product of its (nonzero) digits is 1306368, while the sum is 54.

The square root of 47890989 is about 6920.3315672011. The cubic root of 47890989 is about 363.1487904029.

The spelling of 47890989 in words is "forty-seven million, eight hundred ninety thousand, nine hundred eighty-nine".