68089440 has 48 divisors (see below), whose sum is σ = 214483248. Its totient is φ = 18157056.

The previous prime is 68089421. The next prime is 68089447. The reversal of 68089440 is 4498086.

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 (68089447) 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, 70447 + ... + 71406.

It is an arithmetic number, because the mean of its divisors is an integer number (4468401).

Almost surely, 2^68089440 is an apocalyptic number.

68089440 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

68089440 is an abundant number, since it is smaller than the sum of its proper divisors (146393808).

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

68089440 is a wasteful number, since it uses less digits than its factorization.

68089440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 141871 (or 141863 counting only the distinct ones).

The product of its (nonzero) digits is 55296, while the sum is 39.

The square root of 68089440 is about 8251.6325657412. The cubic root of 68089440 is about 408.3443843555.

The spelling of 68089440 in words is "sixty-eight million, eighty-nine thousand, four hundred forty".