47444145 has 32 divisors (see below), whose sum is σ = 89752320. Its totient is φ = 20939520.

The previous prime is 47444119. The next prime is 47444149. The reversal of 47444145 is 54144474.

It is not a de Polignac number, because 47444145 - 2⁷ = 47444017 is a prime.

It is not an unprimeable number, because it can be changed into a prime (47444149) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4746 + ... + 10835.

It is an arithmetic number, because the mean of its divisors is an integer number (2804760).

Almost surely, 2^47444145 is an apocalyptic number.

It is an amenable number.

47444145 is a deficient number, since it is larger than the sum of its proper divisors (42308175).

47444145 is a wasteful number, since it uses less digits than its factorization.

47444145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15625.

The product of its digits is 35840, while the sum is 33.

The square root of 47444145 is about 6887.9710365245. The cubic root of 47444145 is about 362.0158133361.

It can be divided in two parts, 474441 and 45, that multiplied together give a triangular number (21349845 = T₆₅₃₄).

The spelling of 47444145 in words is "forty-seven million, four hundred forty-four thousand, one hundred forty-five".