678628501 has 12 divisors (see below), whose sum is σ = 716935968. Its totient is φ = 641152424.

The previous prime is 678628499. The next prime is 678628553. The reversal of 678628501 is 105826876.

It is not a de Polignac number, because 678628501 - 2¹ = 678628499 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (678628571) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 156306 + ... + 160588.

It is an arithmetic number, because the mean of its divisors is an integer number (59744664).

Almost surely, 2^678628501 is an apocalyptic number.

It is an amenable number.

678628501 is a deficient number, since it is larger than the sum of its proper divisors (38307467).

678628501 is an equidigital number, since it uses as much as digits as its factorization.

678628501 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4472 (or 4389 counting only the distinct ones).

The product of its (nonzero) digits is 161280, while the sum is 43.

The square root of 678628501 is about 26050.4990547206. The cubic root of 678628501 is about 878.7743357842.

The spelling of 678628501 in words is "six hundred seventy-eight million, six hundred twenty-eight thousand, five hundred one".