1328385 has 32 divisors (see below), whose sum is σ = 2304000. Its totient is φ = 651456.

The previous prime is 1328357. The next prime is 1328387. The reversal of 1328385 is 5838231.

It is a happy number.

It is not a de Polignac number, because 1328385 - 2¹⁴ = 1312001 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1328387) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 16776 + ... + 16854.

It is an arithmetic number, because the mean of its divisors is an integer number (72000).

2^1328385 is an apocalyptic number.

1328385 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1328385 is a deficient number, since it is larger than the sum of its proper divisors (975615).

1328385 is a wasteful number, since it uses less digits than its factorization.

1328385 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 165.

The product of its digits is 5760, while the sum is 30.

The square root of 1328385 is about 1152.5558554795. Note that the first 3 decimals coincide. The cubic root of 1328385 is about 109.9279142032.

The spelling of 1328385 in words is "one million, three hundred twenty-eight thousand, three hundred eighty-five".