68949984 has 48 divisors (see below), whose sum is σ = 185213952. Its totient is φ = 22447488.

The previous prime is 68949971. The next prime is 68949989. The reversal of 68949984 is 48994986.

It is a tau number, because it is divible by the number of its divisors (48).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68949989) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4224 + ... + 12479.

It is an arithmetic number, because the mean of its divisors is an integer number (3858624).

Almost surely, 2^68949984 is an apocalyptic number.

It is an amenable number.

68949984 is an abundant number, since it is smaller than the sum of its proper divisors (116263968).

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

68949984 is a wasteful number, since it uses less digits than its factorization.

68949984 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16759 (or 16751 counting only the distinct ones).

The product of its digits is 4478976, while the sum is 57.

The square root of 68949984 is about 8303.6127077315. The cubic root of 68949984 is about 410.0574656712.

The spelling of 68949984 in words is "sixty-eight million, nine hundred forty-nine thousand, nine hundred eighty-four".