47272644 has 36 divisors (see below), whose sum is σ = 123352320. Its totient is φ = 15248880.

The previous prime is 47272633. The next prime is 47272657. The reversal of 47272644 is 44627274.

It is a happy number.

47272644 is a `hidden beast` number, since 4 + 7 + 2 + 7 + 2 + 644 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 47272599 and 47272608.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 20064 + ... + 22295.

Almost surely, 2^47272644 is an apocalyptic number.

It is an amenable number.

47272644 is an abundant number, since it is smaller than the sum of its proper divisors (76079676).

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

47272644 is a wasteful number, since it uses less digits than its factorization.

47272644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42400 (or 42395 counting only the distinct ones).

The product of its digits is 75264, while the sum is 36.

The square root of 47272644 is about 6875.5104537772. The cubic root of 47272644 is about 361.5790820025.

It can be divided in two parts, 47 and 272644, that added together give a triangular number (272691 = T₇₃₈).

The spelling of 47272644 in words is "forty-seven million, two hundred seventy-two thousand, six hundred forty-four".