68640430 has 8 divisors (see below), whose sum is σ = 123552792. Its totient is φ = 27456168.

The previous prime is 68640421. The next prime is 68640443. The reversal of 68640430 is 3404686.

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

It is a junction number, because it is equal to n+sod(n) for n = 68640392 and 68640401.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3432012 + ... + 3432031.

It is an arithmetic number, because the mean of its divisors is an integer number (15444099).

Almost surely, 2^68640430 is an apocalyptic number.

68640430 is a deficient number, since it is larger than the sum of its proper divisors (54912362).

68640430 is a wasteful number, since it uses less digits than its factorization.

68640430 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6864050.

The product of its (nonzero) digits is 13824, while the sum is 31.

The square root of 68640430 is about 8284.9520215871. The cubic root of 68640430 is about 409.4428879896.

The spelling of 68640430 in words is "sixty-eight million, six hundred forty thousand, four hundred thirty".