1378445829 has 4 divisors (see below), whose sum is σ = 1837927776. Its totient is φ = 918963884.

The previous prime is 1378445813. The next prime is 1378445837. The reversal of 1378445829 is 9285448731.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1378445829 - 2⁴ = 1378445813 is a prime.

It is a super-2 number, since 2×1378445829² = 3800225806974994482, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1378445869) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 229740969 + ... + 229740974.

It is an arithmetic number, because the mean of its divisors is an integer number (459481944).

Almost surely, 2^1378445829 is an apocalyptic number.

It is an amenable number.

1378445829 is a deficient number, since it is larger than the sum of its proper divisors (459481947).

1378445829 is an equidigital number, since it uses as much as digits as its factorization.

1378445829 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 459481946.

The product of its digits is 1935360, while the sum is 51.

The square root of 1378445829 is about 37127.4269105738. The cubic root of 1378445829 is about 1112.9181740487.

The spelling of 1378445829 in words is "one billion, three hundred seventy-eight million, four hundred forty-five thousand, eight hundred twenty-nine".