68640282 has 12 divisors (see below), whose sum is σ = 148720650. Its totient is φ = 22880088.

The previous prime is 68640281. The next prime is 68640283. The reversal of 68640282 is 28204686.

68640282 is a `hidden beast` number, since 6 + 8 + 640 + 2 + 8 + 2 = 666.

It is an interprime number because it is at equal distance from previous prime (68640281) and next prime (68640283).

It can be written as a sum of positive squares in only one way, i.e., 63345681 + 5294601 = 7959^2 + 2301^2 .

It is a super-2 number, since 2×68640282² = 9422976626079048, which contains 22 as substring.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (68640281) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1906657 + ... + 1906692.

Almost surely, 2^68640282 is an apocalyptic number.

68640282 is an abundant number, since it is smaller than the sum of its proper divisors (80080368).

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

68640282 is a wasteful number, since it uses less digits than its factorization.

68640282 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3813357 (or 3813354 counting only the distinct ones).

The product of its (nonzero) digits is 36864, while the sum is 36.

The square root of 68640282 is about 8284.9430897261. The cubic root of 68640282 is about 409.4425937141.

The spelling of 68640282 in words is "sixty-eight million, six hundred forty thousand, two hundred eighty-two".