68897440 has 48 divisors (see below), whose sum is σ = 165225312. Its totient is φ = 27143424.

The previous prime is 68897399. The next prime is 68897449. The reversal of 68897440 is 4479886.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (68897449) 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, 7507 + ... + 13933.

It is an arithmetic number, because the mean of its divisors is an integer number (3442194).

Almost surely, 2^68897440 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 68897440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (82612656).

68897440 is an abundant number, since it is smaller than the sum of its proper divisors (96327872).

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

68897440 is a wasteful number, since it uses less digits than its factorization.

68897440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6509 (or 6501 counting only the distinct ones).

The product of its (nonzero) digits is 387072, while the sum is 46.

The square root of 68897440 is about 8300.4481806707. The cubic root of 68897440 is about 409.9532764523.

The spelling of 68897440 in words is "sixty-eight million, eight hundred ninety-seven thousand, four hundred forty".