47420644 has 12 divisors (see below), whose sum is σ = 83536768. Its totient is φ = 23553000.

The previous prime is 47420629. The next prime is 47420647. The reversal of 47420644 is 44602474.

47420644 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a hoax number, since the sum of its digits (31) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (47420647) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 38652 + ... + 39859.

Almost surely, 2^47420644 is an apocalyptic number.

It is an amenable number.

47420644 is a deficient number, since it is larger than the sum of its proper divisors (36116124).

47420644 is a wasteful number, since it uses less digits than its factorization.

47420644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 78666 (or 78664 counting only the distinct ones).

The product of its (nonzero) digits is 21504, while the sum is 31.

The square root of 47420644 is about 6886.2648801800. The cubic root of 47420644 is about 361.9560297825.

The spelling of 47420644 in words is "forty-seven million, four hundred twenty thousand, six hundred forty-four".