68645740 has 24 divisors (see below), whose sum is σ = 146521872. Its totient is φ = 27007680.

The previous prime is 68645737. The next prime is 68645747. The reversal of 68645740 is 4754686.

It is a hoax number, since the sum of its digits (40) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 68645693 and 68645702.

It is not an unprimeable number, because it can be changed into a prime (68645747) 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, 26914 + ... + 29353.

It is an arithmetic number, because the mean of its divisors is an integer number (6105078).

Almost surely, 2^68645740 is an apocalyptic number.

It is an amenable number.

68645740 is an abundant number, since it is smaller than the sum of its proper divisors (77876132).

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

68645740 is a wasteful number, since it uses less digits than its factorization.

68645740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56337 (or 56335 counting only the distinct ones).

The product of its (nonzero) digits is 161280, while the sum is 40.

The square root of 68645740 is about 8285.2724759057. The cubic root of 68645740 is about 409.4534458376.

The spelling of 68645740 in words is "sixty-eight million, six hundred forty-five thousand, seven hundred forty".