1378245769 has 8 divisors (see below), whose sum is σ = 1456570080. Its totient is φ = 1300500000.

The previous prime is 1378245751. The next prime is 1378245779. The reversal of 1378245769 is 9675428731.

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

It is a cyclic number.

It is not a de Polignac number, because 1378245769 - 2²⁷ = 1244028041 is a prime.

It is a super-2 number, since 2×1378245769² = 3799122799532802722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1378245779) 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, 139732 + ... + 149269.

It is an arithmetic number, because the mean of its divisors is an integer number (182071260).

Almost surely, 2^1378245769 is an apocalyptic number.

1378245769 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

It is an amenable number.

1378245769 is a deficient number, since it is larger than the sum of its proper divisors (78324311).

1378245769 is a wasteful number, since it uses less digits than its factorization.

1378245769 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 289271.

The product of its digits is 2540160, while the sum is 52.

The square root of 1378245769 is about 37124.7325781614. The cubic root of 1378245769 is about 1112.8643305153.

The spelling of 1378245769 in words is "one billion, three hundred seventy-eight million, two hundred forty-five thousand, seven hundred sixty-nine".