1378436243 has 8 divisors (see below), whose sum is σ = 1406118528. Its totient is φ = 1350816064.

The previous prime is 1378436239. The next prime is 1378436249. The reversal of 1378436243 is 3426348731.

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 1378436243 - 2² = 1378436239 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1378436243.

It is not an unprimeable number, because it can be changed into a prime (1378436249) 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, 30671 + ... + 60807.

It is an arithmetic number, because the mean of its divisors is an integer number (175764816).

Almost surely, 2^1378436243 is an apocalyptic number.

1378436243 is a deficient number, since it is larger than the sum of its proper divisors (27682285).

1378436243 is an equidigital number, since it uses as much as digits as its factorization.

1378436243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31053.

The product of its digits is 290304, while the sum is 41.

The square root of 1378436243 is about 37127.2978144114. The cubic root of 1378436243 is about 1112.9155942209.

The spelling of 1378436243 in words is "one billion, three hundred seventy-eight million, four hundred thirty-six thousand, two hundred forty-three".