284638988 has 6 divisors (see below), whose sum is σ = 498118236. Its totient is φ = 142319492.

The previous prime is 284638987. The next prime is 284639101. The reversal of 284638988 is 889836482.

It is not an unprimeable number, because it can be changed into a prime (284638987) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35579870 + ... + 35579877.

It is an arithmetic number, because the mean of its divisors is an integer number (83019706).

Almost surely, 2^284638988 is an apocalyptic number.

It is an amenable number.

284638988 is a deficient number, since it is larger than the sum of its proper divisors (213479248).

284638988 is a wasteful number, since it uses less digits than its factorization.

284638988 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71159751 (or 71159749 counting only the distinct ones).

The product of its digits is 5308416, while the sum is 56.

The square root of 284638988 is about 16871.2473753425. The cubic root of 284638988 is about 657.8064520065.

The spelling of 284638988 in words is "two hundred eighty-four million, six hundred thirty-eight thousand, nine hundred eighty-eight".