284624989 has 8 divisors (see below), whose sum is σ = 310655232. Its totient is φ = 258620640.

The previous prime is 284624987. The next prime is 284625001. The reversal of 284624989 is 989426482.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 284624989 - 2¹ = 284624987 is a prime.

It is a super-2 number, since 2×284624989² = 162022768726500242, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (284624987) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21972 + ... + 32434.

It is an arithmetic number, because the mean of its divisors is an integer number (38831904).

Almost surely, 2^284624989 is an apocalyptic number.

It is an amenable number.

284624989 is a deficient number, since it is larger than the sum of its proper divisors (26030243).

284624989 is a wasteful number, since it uses less digits than its factorization.

284624989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12947.

The product of its digits is 1990656, while the sum is 52.

The square root of 284624989 is about 16870.8324927966. The cubic root of 284624989 is about 657.7956678391.

The spelling of 284624989 in words is "two hundred eighty-four million, six hundred twenty-four thousand, nine hundred eighty-nine".