47988945 has 24 divisors (see below), whose sum is σ = 84240000. Its totient is φ = 25268256.

The previous prime is 47988937. The next prime is 47988947. The reversal of 47988945 is 54988974.

47988945 is a `hidden beast` number, since 479 + 88 + 94 + 5 = 666.

It is not a de Polignac number, because 47988945 - 2³ = 47988937 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 47988891 and 47988900.

It is not an unprimeable number, because it can be changed into a prime (47988947) 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 23 ways as a sum of consecutive naturals, for example, 3195 + ... + 10304.

It is an arithmetic number, because the mean of its divisors is an integer number (3510000).

Almost surely, 2^47988945 is an apocalyptic number.

47988945 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

It is an amenable number.

47988945 is a deficient number, since it is larger than the sum of its proper divisors (36251055).

47988945 is a wasteful number, since it uses less digits than its factorization.

47988945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13589 (or 13586 counting only the distinct ones).

The product of its digits is 2903040, while the sum is 54.

The square root of 47988945 is about 6927.4053584297. The cubic root of 47988945 is about 363.3962160518.

The spelling of 47988945 in words is "forty-seven million, nine hundred eighty-eight thousand, nine hundred forty-five".