47144728 has 8 divisors (see below), whose sum is σ = 88396380. Its totient is φ = 23572360.

The previous prime is 47144693. The next prime is 47144729. The reversal of 47144728 is 82744174.

It is a tau number, because it is divible by the number of its divisors (8).

It is a hoax number, since the sum of its digits (37) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (47144729) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2946538 + ... + 2946553.

Almost surely, 2^47144728 is an apocalyptic number.

It is an amenable number.

47144728 is a deficient number, since it is larger than the sum of its proper divisors (41251652).

47144728 is a wasteful number, since it uses less digits than its factorization.

47144728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5893097 (or 5893093 counting only the distinct ones).

The product of its digits is 50176, while the sum is 37.

The square root of 47144728 is about 6866.2018612913. The cubic root of 47144728 is about 361.2526526866.

The spelling of 47144728 in words is "forty-seven million, one hundred forty-four thousand, seven hundred twenty-eight".