1328587957 has 8 divisors (see below), whose sum is σ = 1352774592. Its totient is φ = 1304529600.

The previous prime is 1328587943. The next prime is 1328588003. The reversal of 1328587957 is 7597858231.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1328587957 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1328587898 and 1328587907.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1328587357) 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, 11044 + ... + 52717.

It is an arithmetic number, because the mean of its divisors is an integer number (169096824).

Almost surely, 2^1328587957 is an apocalyptic number.

It is an amenable number.

1328587957 is a deficient number, since it is larger than the sum of its proper divisors (24186635).

1328587957 is an equidigital number, since it uses as much as digits as its factorization.

1328587957 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64139.

The product of its digits is 4233600, while the sum is 55.

The square root of 1328587957 is about 36449.8005069987. The cubic root of 1328587957 is about 1099.3351235520.

The spelling of 1328587957 in words is "one billion, three hundred twenty-eight million, five hundred eighty-seven thousand, nine hundred fifty-seven".