47439145 has 24 divisors (see below), whose sum is σ = 63666432. Its totient is φ = 33883200.

The previous prime is 47439109. The next prime is 47439167. The reversal of 47439145 is 54193474.

It is not a de Polignac number, because 47439145 - 2⁷ = 47439017 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 25290 + ... + 27100.

It is an arithmetic number, because the mean of its divisors is an integer number (2652768).

Almost surely, 2^47439145 is an apocalyptic number.

It is an amenable number.

47439145 is a deficient number, since it is larger than the sum of its proper divisors (16227287).

47439145 is a wasteful number, since it uses less digits than its factorization.

47439145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1873 (or 1860 counting only the distinct ones).

The product of its digits is 60480, while the sum is 37.

The square root of 47439145 is about 6887.6080753771. The cubic root of 47439145 is about 362.0030956259.

The spelling of 47439145 in words is "forty-seven million, four hundred thirty-nine thousand, one hundred forty-five".