1328907457 has 4 divisors (see below), whose sum is σ = 1361319876. Its totient is φ = 1296495040.

The previous prime is 1328907449. The next prime is 1328907467. The reversal of 1328907457 is 7547098231.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 503149761 + 825757696 = 22431^2 + 28736^2 .

It is a cyclic number.

It is not a de Polignac number, because 1328907457 - 2³ = 1328907449 is a prime.

It is a super-3 number, since 3×1328907457³ (a number of 28 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1328907467) 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, 16206148 + ... + 16206229.

It is an arithmetic number, because the mean of its divisors is an integer number (340329969).

Almost surely, 2^1328907457 is an apocalyptic number.

It is an amenable number.

1328907457 is a deficient number, since it is larger than the sum of its proper divisors (32412419).

1328907457 is an equidigital number, since it uses as much as digits as its factorization.

1328907457 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32412418.

The product of its (nonzero) digits is 423360, while the sum is 46.

The square root of 1328907457 is about 36454.1829835754. The cubic root of 1328907457 is about 1099.4232395146.

The spelling of 1328907457 in words is "one billion, three hundred twenty-eight million, nine hundred seven thousand, four hundred fifty-seven".