284061981 has 32 divisors (see below), whose sum is σ = 445132800. Its totient is φ = 157749120.

The previous prime is 284061941. The next prime is 284061991. The reversal of 284061981 is 189160482.

It is not a de Polignac number, because 284061981 - 2⁶ = 284061917 is a prime.

It is a super-2 number, since 2×284061981² = 161382418099288722, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (284061941) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 308640 + ... + 309558.

It is an arithmetic number, because the mean of its divisors is an integer number (13910400).

Almost surely, 2^284061981 is an apocalyptic number.

284061981 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

284061981 is a deficient number, since it is larger than the sum of its proper divisors (161070819).

284061981 is a wasteful number, since it uses less digits than its factorization.

284061981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1329.

The product of its (nonzero) digits is 27648, while the sum is 39.

The square root of 284061981 is about 16854.1383938782. The cubic root of 284061981 is about 657.3616597053.

The spelling of 284061981 in words is "two hundred eighty-four million, sixty-one thousand, nine hundred eighty-one".