68745040 has 240 divisors, whose sum is σ = 213736320. Its totient is φ = 20321280.

The previous prime is 68745023. The next prime is 68745041. The reversal of 68745040 is 4054786.

It is a junction number, because it is equal to n+sod(n) for n = 68744987 and 68745005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68745041) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 968205 + ... + 968275.

It is an arithmetic number, because the mean of its divisors is an integer number (890568).

Almost surely, 2^68745040 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 68745040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (106868160).

68745040 is an abundant number, since it is smaller than the sum of its proper divisors (144991280).

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

68745040 is a wasteful number, since it uses less digits than its factorization.

68745040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 130 (or 117 counting only the distinct ones).

The product of its (nonzero) digits is 26880, while the sum is 34.

The square root of 68745040 is about 8291.2628712398. The cubic root of 68745040 is about 409.6507833458.

The spelling of 68745040 in words is "sixty-eight million, seven hundred forty-five thousand, forty".