1378890165 has 8 divisors (see below), whose sum is σ = 2206224288. Its totient is φ = 735408080.

The previous prime is 1378890143. The next prime is 1378890167. The reversal of 1378890165 is 5610988731.

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

It is not a de Polignac number, because 1378890165 - 2⁶ = 1378890101 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1378890167) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 45962991 + ... + 45963020.

It is an arithmetic number, because the mean of its divisors is an integer number (275778036).

Almost surely, 2^1378890165 is an apocalyptic number.

1378890165 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1378890165 is a deficient number, since it is larger than the sum of its proper divisors (827334123).

1378890165 is an equidigital number, since it uses as much as digits as its factorization.

1378890165 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 91926019.

The product of its (nonzero) digits is 362880, while the sum is 48.

The square root of 1378890165 is about 37133.4103604826. The cubic root of 1378890165 is about 1113.0377426417.

The spelling of 1378890165 in words is "one billion, three hundred seventy-eight million, eight hundred ninety thousand, one hundred sixty-five".