68440507 has 8 divisors (see below), whose sum is σ = 70027776. Its totient is φ = 66858792.

The previous prime is 68440501. The next prime is 68440511. The reversal of 68440507 is 70504486.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 68440507 - 2¹¹ = 68438459 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (68440501) 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, 33168 + ... + 35170.

It is an arithmetic number, because the mean of its divisors is an integer number (8753472).

Almost surely, 2^68440507 is an apocalyptic number.

68440507 is a deficient number, since it is larger than the sum of its proper divisors (1587269).

68440507 is a wasteful number, since it uses less digits than its factorization.

68440507 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2777.

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

The square root of 68440507 is about 8272.8777943349. The cubic root of 68440507 is about 409.0449852182.

The spelling of 68440507 in words is "sixty-eight million, four hundred forty thousand, five hundred seven".