68203440 has 60 divisors (see below), whose sum is σ = 229052304. Its totient is φ = 18187392.

The previous prime is 68203417. The next prime is 68203453. The reversal of 68203440 is 4430286.

It is a tau number, because it is divible by the number of its divisors (60).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 46644 + ... + 48083.

Almost surely, 2^68203440 is an apocalyptic number.

68203440 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

68203440 is an abundant number, since it is smaller than the sum of its proper divisors (160848864).

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

68203440 is a wasteful number, since it uses less digits than its factorization.

68203440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 94746 (or 94737 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 27.

The square root of 68203440 is about 8258.5374007750. The cubic root of 68203440 is about 408.5721499933.

The spelling of 68203440 in words is "sixty-eight million, two hundred three thousand, four hundred forty".