1378440193 has 8 divisors (see below), whose sum is σ = 1494307136. Its totient is φ = 1263978000.

The previous prime is 1378440181. The next prime is 1378440247. The reversal of 1378440193 is 3910448731.

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 1378440193 - 2²¹ = 1376343041 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1378440103) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 349143 + ... + 353068.

It is an arithmetic number, because the mean of its divisors is an integer number (186788392).

Almost surely, 2^1378440193 is an apocalyptic number.

1378440193 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

1378440193 is a deficient number, since it is larger than the sum of its proper divisors (115866943).

1378440193 is a wasteful number, since it uses less digits than its factorization.

1378440193 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 702375.

The product of its (nonzero) digits is 72576, while the sum is 40.

The square root of 1378440193 is about 37127.3510097341. The cubic root of 1378440193 is about 1112.9166572643.

The spelling of 1378440193 in words is "one billion, three hundred seventy-eight million, four hundred forty thousand, one hundred ninety-three".