68400646 has 8 divisors (see below), whose sum is σ = 108001080. Its totient is φ = 32400288.

The previous prime is 68400641. The next prime is 68400677. The reversal of 68400646 is 64600486.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68400641) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 899971 + ... + 900046.

It is an arithmetic number, because the mean of its divisors is an integer number (13500135).

Almost surely, 2^68400646 is an apocalyptic number.

68400646 is a deficient number, since it is larger than the sum of its proper divisors (39600434).

68400646 is a wasteful number, since it uses less digits than its factorization.

68400646 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1800038.

The product of its (nonzero) digits is 27648, while the sum is 34.

The square root of 68400646 is about 8270.4683059667. The cubic root of 68400646 is about 408.9655580421.

The spelling of 68400646 in words is "sixty-eight million, four hundred thousand, six hundred forty-six".