47442645 has 16 divisors (see below), whose sum is σ = 84342720. Its totient is φ = 25302672.

The previous prime is 47442613. The next prime is 47442649. The reversal of 47442645 is 54624474.

47442645 is a `hidden beast` number, since 4 + 7 + 4 + 4 + 2 + 645 = 666.

It is not a de Polignac number, because 47442645 - 2⁵ = 47442613 is a prime.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (47442649) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 175579 + ... + 175848.

It is an arithmetic number, because the mean of its divisors is an integer number (5271420).

Almost surely, 2^47442645 is an apocalyptic number.

47442645 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

It is an amenable number.

47442645 is a deficient number, since it is larger than the sum of its proper divisors (36900075).

47442645 is a wasteful number, since it uses less digits than its factorization.

47442645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 351441 (or 351435 counting only the distinct ones).

The product of its digits is 107520, while the sum is 36.

The square root of 47442645 is about 6887.8621501885. The cubic root of 47442645 is about 362.0119981168.

The spelling of 47442645 in words is "forty-seven million, four hundred forty-two thousand, six hundred forty-five".