1678628041 has 4 divisors (see below), whose sum is σ = 1678743684. Its totient is φ = 1678512400.

The previous prime is 1678628009. The next prime is 1678628047. The reversal of 1678628041 is 1408268761.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 1661785225 + 16842816 = 40765^2 + 4104^2 .

It is a cyclic number.

It is not a de Polignac number, because 1678628041 - 2⁵ = 1678628009 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1678628047) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 32290 + ... + 66331.

It is an arithmetic number, because the mean of its divisors is an integer number (419685921).

Almost surely, 2^1678628041 is an apocalyptic number.

It is an amenable number.

1678628041 is a deficient number, since it is larger than the sum of its proper divisors (115643).

1678628041 is an equidigital number, since it uses as much as digits as its factorization.

1678628041 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 115642.

The product of its (nonzero) digits is 129024, while the sum is 43.

The square root of 1678628041 is about 40971.0634594710. The cubic root of 1678628041 is about 1188.4606985652.

The spelling of 1678628041 in words is "one billion, six hundred seventy-eight million, six hundred twenty-eight thousand, forty-one".