68245440 has 56 divisors (see below), whose sum is σ = 216682320. Its totient is φ = 18198528.

The previous prime is 68245423. The next prime is 68245447. The reversal of 68245440 is 4454286.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68245447) 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, 34585 + ... + 36504.

Almost surely, 2^68245440 is an apocalyptic number.

68245440 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

68245440 is an abundant number, since it is smaller than the sum of its proper divisors (148436880).

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

68245440 is a wasteful number, since it uses less digits than its factorization.

68245440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71109 (or 71099 counting only the distinct ones).

The product of its (nonzero) digits is 30720, while the sum is 33.

The square root of 68245440 is about 8261.0798325643. The cubic root of 68245440 is about 408.6559996695.

The spelling of 68245440 in words is "sixty-eight million, two hundred forty-five thousand, four hundred forty".