284911947 has 12 divisors (see below), whose sum is σ = 412647664. Its totient is φ = 189429840.

The previous prime is 284911943. The next prime is 284911967. The reversal of 284911947 is 749119482.

It is a happy number.

It is not a de Polignac number, because 284911947 - 2² = 284911943 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (284911943) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 39079 + ... + 45792.

Almost surely, 2^284911947 is an apocalyptic number.

284911947 is a deficient number, since it is larger than the sum of its proper divisors (127735717).

284911947 is a wasteful number, since it uses less digits than its factorization.

284911947 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85250 (or 85247 counting only the distinct ones).

The product of its digits is 145152, while the sum is 45.

The square root of 284911947 is about 16879.3349098831. The cubic root of 284911947 is about 658.0166560825.

The spelling of 284911947 in words is "two hundred eighty-four million, nine hundred eleven thousand, nine hundred forty-seven".