47644065 has 32 divisors (see below), whose sum is σ = 96802560. Its totient is φ = 21779712.

The previous prime is 47644061. The next prime is 47644097. The reversal of 47644065 is 56044674.

47644065 is a `hidden beast` number, since 4 + 7 + 644 + 0 + 6 + 5 = 666.

It is not a de Polignac number, because 47644065 - 2² = 47644061 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (47644061) 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, 24264 + ... + 26153.

It is an arithmetic number, because the mean of its divisors is an integer number (3025080).

Almost surely, 2^47644065 is an apocalyptic number.

47644065 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

It is an amenable number.

47644065 is an abundant number, since it is smaller than the sum of its proper divisors (49158495).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

47644065 is a wasteful number, since it uses less digits than its factorization.

47644065 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50438 (or 50432 counting only the distinct ones).

The product of its (nonzero) digits is 80640, while the sum is 36.

The square root of 47644065 is about 6902.4680368691. The cubic root of 47644065 is about 362.5235878428.

The spelling of 47644065 in words is "forty-seven million, six hundred forty-four thousand, sixty-five".