1320005678 has 8 divisors (see below), whose sum is σ = 1980780480. Its totient is φ = 659745520.

The previous prime is 1320005633. The next prime is 1320005683. The reversal of 1320005678 is 8765000231.

It is a happy number.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 122183 + ... + 132546.

It is an arithmetic number, because the mean of its divisors is an integer number (247597560).

Almost surely, 2^1320005678 is an apocalyptic number.

1320005678 is a deficient number, since it is larger than the sum of its proper divisors (660774802).

1320005678 is a wasteful number, since it uses less digits than its factorization.

1320005678 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 257322.

The product of its (nonzero) digits is 10080, while the sum is 32.

The square root of 1320005678 is about 36331.8823899891. The cubic root of 1320005678 is about 1096.9628833495.

The spelling of 1320005678 in words is "one billion, three hundred twenty million, five thousand, six hundred seventy-eight".