1378838415 has 8 divisors (see below), whose sum is σ = 2206141488. Its totient is φ = 735380480.

The previous prime is 1378838399. The next prime is 1378838423. The reversal of 1378838415 is 5148388731.

It is a happy number.

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

It is not a de Polignac number, because 1378838415 - 2⁴ = 1378838399 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 45961266 + ... + 45961295.

It is an arithmetic number, because the mean of its divisors is an integer number (275767686).

Almost surely, 2^1378838415 is an apocalyptic number.

1378838415 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1378838415 is a deficient number, since it is larger than the sum of its proper divisors (827303073).

1378838415 is an equidigital number, since it uses as much as digits as its factorization.

1378838415 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 91922569.

The product of its digits is 645120, while the sum is 48.

The square root of 1378838415 is about 37132.7135421046. The cubic root of 1378838415 is about 1113.0238182975.

The spelling of 1378838415 in words is "one billion, three hundred seventy-eight million, eight hundred thirty-eight thousand, four hundred fifteen".