1378821382 has 8 divisors (see below), whose sum is σ = 2069150400. Its totient is φ = 689104584.

The previous prime is 1378821377. The next prime is 1378821383. The reversal of 1378821382 is 2831288731.

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

It is a super-2 number, since 2×1378821382² = 3802296806920779848, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1378821383) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 147382 + ... + 156457.

It is an arithmetic number, because the mean of its divisors is an integer number (258643800).

Almost surely, 2^1378821382 is an apocalyptic number.

1378821382 is a deficient number, since it is larger than the sum of its proper divisors (690329018).

1378821382 is a wasteful number, since it uses less digits than its factorization.

1378821382 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 306110.

The product of its digits is 129024, while the sum is 43.

The square root of 1378821382 is about 37132.4841883761. The cubic root of 1378821382 is about 1113.0192351613.

The spelling of 1378821382 in words is "one billion, three hundred seventy-eight million, eight hundred twenty-one thousand, three hundred eighty-two".