1328605407 has 12 divisors (see below), whose sum is σ = 1930590480. Its totient is φ = 880432128.

The previous prime is 1328605387. The next prime is 1328605429. The reversal of 1328605407 is 7045068231.

1328605407 is a `hidden beast` number, since 1 + 3 + 2 + 8 + 605 + 40 + 7 = 666.

It is not a de Polignac number, because 1328605407 - 2⁷ = 1328605279 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1328605807) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 440482 + ... + 443487.

It is an arithmetic number, because the mean of its divisors is an integer number (160882540).

Almost surely, 2^1328605407 is an apocalyptic number.

1328605407 is a deficient number, since it is larger than the sum of its proper divisors (601985073).

1328605407 is a wasteful number, since it uses less digits than its factorization.

1328605407 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 884142 (or 884139 counting only the distinct ones).

The product of its (nonzero) digits is 40320, while the sum is 36.

The square root of 1328605407 is about 36450.0398765214. The cubic root of 1328605407 is about 1099.3399365099.

The spelling of 1328605407 in words is "one billion, three hundred twenty-eight million, six hundred five thousand, four hundred seven".