1328577649 has 8 divisors (see below), whose sum is σ = 1518703488. Its totient is φ = 1138534080.

The previous prime is 1328577647. The next prime is 1328577661. The reversal of 1328577649 is 9467758231.

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

It is a cyclic number.

It is not a de Polignac number, because 1328577649 - 2¹ = 1328577647 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1328577596 and 1328577605.

It is not an unprimeable number, because it can be changed into a prime (1328577643) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19164 + ... + 54994.

It is an arithmetic number, because the mean of its divisors is an integer number (189837936).

Almost surely, 2^1328577649 is an apocalyptic number.

It is an amenable number.

1328577649 is a deficient number, since it is larger than the sum of its proper divisors (190125839).

1328577649 is an equidigital number, since it uses as much as digits as its factorization.

1328577649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41135.

The product of its digits is 2540160, while the sum is 52.

The square root of 1328577649 is about 36449.6591067736. The cubic root of 1328577649 is about 1099.3322804393.

The spelling of 1328577649 in words is "one billion, three hundred twenty-eight million, five hundred seventy-seven thousand, six hundred forty-nine".