283215240 has 384 divisors, whose sum is σ = 1217099520. Its totient is φ = 55296000.

The previous prime is 283215227. The next prime is 283215259. The reversal of 283215240 is 42512382.

283215240 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a Cunningham number, because it is equal to 16829²-1.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 470940 + ... + 471540.

It is an arithmetic number, because the mean of its divisors is an integer number (3169530).

Almost surely, 2^283215240 is an apocalyptic number.

283215240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 283215240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (608549760).

283215240 is an abundant number, since it is smaller than the sum of its proper divisors (933884280).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

283215240 is a wasteful number, since it uses less digits than its factorization.

283215240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 653 (or 646 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 27.

The square root of 283215240 is about 16828.9999702894. Note that the first 4 decimals coincide. The cubic root of 283215240 is about 656.7078481163.

The spelling of 283215240 in words is "two hundred eighty-three million, two hundred fifteen thousand, two hundred forty".