282656640 has 128 divisors (see below), whose sum is σ = 1029726720. Its totient is φ = 64604160.

The previous prime is 282656629. The next prime is 282656651. The reversal of 282656640 is 46656282.

It is an interprime number because it is at equal distance from previous prime (282656629) and next prime (282656651).

It is a tau number, because it is divible by the number of its divisors (128).

It is a super-2 number, since 2×282656640² = 159789552272179200, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2925 + ... + 23955.

It is an arithmetic number, because the mean of its divisors is an integer number (8044740).

Almost surely, 2^282656640 is an apocalyptic number.

282656640 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 282656640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (514863360).

282656640 is an abundant number, since it is smaller than the sum of its proper divisors (747070080).

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

282656640 is a wasteful number, since it uses less digits than its factorization.

282656640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21060 (or 21048 counting only the distinct ones).

The product of its (nonzero) digits is 138240, while the sum is 39.

The square root of 282656640 is about 16812.3954271841. The cubic root of 282656640 is about 656.2758110483.

The spelling of 282656640 in words is "two hundred eighty-two million, six hundred fifty-six thousand, six hundred forty".