1378019445 has 16 divisors (see below), whose sum is σ = 2405270592. Its totient is φ = 668130560.

The previous prime is 1378019429. The next prime is 1378019449. The reversal of 1378019445 is 5449108731.

It is a happy number.

It is not a de Polignac number, because 1378019445 - 2⁴ = 1378019429 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1378019397 and 1378019406.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1378019449) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4175652 + ... + 4175981.

It is an arithmetic number, because the mean of its divisors is an integer number (150329412).

Almost surely, 2^1378019445 is an apocalyptic number.

1378019445 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1378019445 is a deficient number, since it is larger than the sum of its proper divisors (1027251147).

1378019445 is a wasteful number, since it uses less digits than its factorization.

1378019445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8351652.

The product of its (nonzero) digits is 120960, while the sum is 42.

The square root of 1378019445 is about 37121.6842963786. The cubic root of 1378019445 is about 1112.8034120878.

The spelling of 1378019445 in words is "one billion, three hundred seventy-eight million, nineteen thousand, four hundred forty-five".