1678328325 has 54 divisors (see below), whose sum is σ = 3094209014. Its totient is φ = 868976640.

The previous prime is 1678328321. The next prime is 1678328329. The reversal of 1678328325 is 5238238761.

It is an interprime number because it is at equal distance from previous prime (1678328321) and next prime (1678328329).

It can be written as a sum of positive squares in 9 ways, for example, as 63011844 + 1615316481 = 7938^2 + 40191^2 .

It is not a de Polignac number, because 1678328325 - 2² = 1678328321 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1678328321) by changing a digit.

It is a polite number, since it can be written in 53 ways as a sum of consecutive naturals, for example, 3737701 + ... + 3738149.

Almost surely, 2^1678328325 is an apocalyptic number.

1678328325 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1678328325 is a deficient number, since it is larger than the sum of its proper divisors (1415880689).

1678328325 is an equidigital number, since it uses as much as digits as its factorization.

1678328325 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 951 (or 494 counting only the distinct ones).

The product of its digits is 483840, while the sum is 45.

The square root of 1678328325 is about 40967.4056415585. The cubic root of 1678328325 is about 1188.3899618525.

The spelling of 1678328325 in words is "one billion, six hundred seventy-eight million, three hundred twenty-eight thousand, three hundred twenty-five".