68909144 has 32 divisors (see below), whose sum is σ = 133056000. Its totient is φ = 33440160.

The previous prime is 68909117. The next prime is 68909147. The reversal of 68909144 is 44190986.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68909147) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 48557 + ... + 49955.

It is an arithmetic number, because the mean of its divisors is an integer number (4158000).

Almost surely, 2^68909144 is an apocalyptic number.

It is an amenable number.

68909144 is a deficient number, since it is larger than the sum of its proper divisors (64146856).

68909144 is a wasteful number, since it uses less digits than its factorization.

68909144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1583 (or 1579 counting only the distinct ones).

The product of its (nonzero) digits is 62208, while the sum is 41.

The square root of 68909144 is about 8301.1531729031. The cubic root of 68909144 is about 409.9764888362.

The spelling of 68909144 in words is "sixty-eight million, nine hundred nine thousand, one hundred forty-four".