68981648 has 20 divisors (see below), whose sum is σ = 141514380. Its totient is φ = 32461824.

The previous prime is 68981629. The next prime is 68981651. The reversal of 68981648 is 84618986.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 40551424 + 28430224 = 6368^2 + 5332^2 .

It is a junction number, because it is equal to n+sod(n) for n = 68981596 and 68981605.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 126533 + ... + 127076.

It is an arithmetic number, because the mean of its divisors is an integer number (7075719).

Almost surely, 2^68981648 is an apocalyptic number.

68981648 is a gapful number since it is divisible by the number (68) formed by its first and last digit.

It is an amenable number.

68981648 is an abundant number, since it is smaller than the sum of its proper divisors (72532732).

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

68981648 is a wasteful number, since it uses less digits than its factorization.

68981648 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 253634 (or 253628 counting only the distinct ones).

The product of its digits is 663552, while the sum is 50.

The square root of 68981648 is about 8305.5191288685. The cubic root of 68981648 is about 410.1202264909.

The spelling of 68981648 in words is "sixty-eight million, nine hundred eighty-one thousand, six hundred forty-eight".