1390327665 has 8 divisors (see below), whose sum is σ = 2224524288. Its totient is φ = 741508080.

The previous prime is 1390327663. The next prime is 1390327669. The reversal of 1390327665 is 5667230931.

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

It is not a de Polignac number, because 1390327665 - 2¹ = 1390327663 is a prime.

It is a super-2 number, since 2×1390327665² = 3866022032128704450, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1390327663) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 46344241 + ... + 46344270.

It is an arithmetic number, because the mean of its divisors is an integer number (278065536).

Almost surely, 2^1390327665 is an apocalyptic number.

1390327665 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1390327665 is a deficient number, since it is larger than the sum of its proper divisors (834196623).

1390327665 is an equidigital number, since it uses as much as digits as its factorization.

1390327665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 92688519.

The product of its (nonzero) digits is 204120, while the sum is 42.

The square root of 1390327665 is about 37287.0978355785. The cubic root of 1390327665 is about 1116.1067161668.

The spelling of 1390327665 in words is "one billion, three hundred ninety million, three hundred twenty-seven thousand, six hundred sixty-five".