47989784 has 8 divisors (see below), whose sum is σ = 89980860. Its totient is φ = 23994888.

The previous prime is 47989783. The next prime is 47989787. The reversal of 47989784 is 48798974.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (47989783) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2999354 + ... + 2999369.

Almost surely, 2^47989784 is an apocalyptic number.

It is an amenable number.

47989784 is a deficient number, since it is larger than the sum of its proper divisors (41991076).

47989784 is a wasteful number, since it uses less digits than its factorization.

47989784 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5998729 (or 5998725 counting only the distinct ones).

The product of its digits is 4064256, while the sum is 56.

The square root of 47989784 is about 6927.4659147483. The cubic root of 47989784 is about 363.3983338149.

The spelling of 47989784 in words is "forty-seven million, nine hundred eighty-nine thousand, seven hundred eighty-four".