284428011 has 16 divisors (see below), whose sum is σ = 437625344. Its totient is φ = 160951104.

The previous prime is 284427989. The next prime is 284428031. The reversal of 284428011 is 110824482.

It is a de Polignac number, because none of the positive numbers 2^k-284428011 is a prime.

It is a super-2 number, since 2×284428011² = 161798586882832242, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 284428011.

It is not an unprimeable number, because it can be changed into a prime (284428031) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 63586 + ... + 67911.

It is an arithmetic number, because the mean of its divisors is an integer number (27351584).

Almost surely, 2^284428011 is an apocalyptic number.

284428011 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

284428011 is a deficient number, since it is larger than the sum of its proper divisors (153197333).

284428011 is a wasteful number, since it uses less digits than its factorization.

284428011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 131610.

The product of its (nonzero) digits is 4096, while the sum is 30.

The square root of 284428011 is about 16864.9936554984. The cubic root of 284428011 is about 657.6438877987.

The spelling of 284428011 in words is "two hundred eighty-four million, four hundred twenty-eight thousand, eleven".