1328907458 has 18 divisors (see below), whose sum is σ = 2018496459. Its totient is φ = 656179312.

The previous prime is 1328907449. The next prime is 1328907467. The reversal of 1328907458 is 8547098231.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (1328907449) and next prime (1328907467).

It can be written as a sum of positive squares in 5 ways, for example, as 722910769 + 605996689 = 26887^2 + 24617^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=25777.

It is a Duffinian number.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 7681460 + ... + 7681632.

Almost surely, 2^1328907458 is an apocalyptic number.

1328907458 is a deficient number, since it is larger than the sum of its proper divisors (689589001).

1328907458 is an frugal number, since it uses more digits than its factorization.

1328907458 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 646 (or 324 counting only the distinct ones).

The product of its (nonzero) digits is 483840, while the sum is 47.

The square root of 1328907458 is about 36454.1829972913. The cubic root of 1328907458 is about 1099.4232397904.

The spelling of 1328907458 in words is "one billion, three hundred twenty-eight million, nine hundred seven thousand, four hundred fifty-eight".