68953840 has 40 divisors (see below), whose sum is σ = 160882560. Its totient is φ = 27484416.

The previous prime is 68953837. The next prime is 68953847. The reversal of 68953840 is 4835986.

It is a tau number, because it is divible by the number of its divisors (40).

It is a Smith number, since the sum of its digits (43) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68953847) 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, 24001 + ... + 26719.

It is an arithmetic number, because the mean of its divisors is an integer number (4022064).

Almost surely, 2^68953840 is an apocalyptic number.

It is an amenable number.

68953840 is an abundant number, since it is smaller than the sum of its proper divisors (91928720).

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

68953840 is a wasteful number, since it uses less digits than its factorization.

68953840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3049 (or 3043 counting only the distinct ones).

The product of its (nonzero) digits is 207360, while the sum is 43.

The square root of 68953840 is about 8303.8448925784. The cubic root of 68953840 is about 410.0651096281.

The spelling of 68953840 in words is "sixty-eight million, nine hundred fifty-three thousand, eight hundred forty".