282778981 has 8 divisors (see below), whose sum is σ = 290211584. Its totient is φ = 275436720.

The previous prime is 282778973. The next prime is 282779017. The reversal of 282778981 is 189877282.

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 282778981 - 2³ = 282778973 is a prime.

It is a super-2 number, since 2×282778981² = 159927904190796722, 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 (282778381) 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, 16221 + ... + 28786.

It is an arithmetic number, because the mean of its divisors is an integer number (36276448).

Almost surely, 2^282778981 is an apocalyptic number.

It is an amenable number.

282778981 is a deficient number, since it is larger than the sum of its proper divisors (7432603).

282778981 is a wasteful number, since it uses less digits than its factorization.

282778981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45171.

The product of its digits is 903168, while the sum is 52.

The square root of 282778981 is about 16816.0334502522. The cubic root of 282778981 is about 656.3704816918.

The spelling of 282778981 in words is "two hundred eighty-two million, seven hundred seventy-eight thousand, nine hundred eighty-one".