1328907 has 16 divisors (see below), whose sum is σ = 1907712. Its totient is φ = 819840.

The previous prime is 1328897. The next prime is 1328909. The reversal of 1328907 is 7098231.

It is a happy number.

It is not a de Polignac number, because 1328907 - 2⁴ = 1328891 is a prime.

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (1328909) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3438 + ... + 3804.

It is an arithmetic number, because the mean of its divisors is an integer number (119232).

2^1328907 is an apocalyptic number.

1328907 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

1328907 is a deficient number, since it is larger than the sum of its proper divisors (578805).

1328907 is a wasteful number, since it uses less digits than its factorization.

1328907 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 458.

The product of its (nonzero) digits is 3024, while the sum is 30.

The square root of 1328907 is about 1152.7822864704. The cubic root of 1328907 is about 109.9423113487.

It can be divided in two parts, 13 and 28907, that added together give a triangular number (28920 = T₂₄₀).

The spelling of 1328907 in words is "one million, three hundred twenty-eight thousand, nine hundred seven".