1378329650 has 24 divisors (see below), whose sum is σ = 2592507060. Its totient is φ = 545135360.

The previous prime is 1378329649. The next prime is 1378329653. The reversal of 1378329650 is 569238731.

It can be written as a sum of positive squares in 6 ways, for example, as 33860761 + 1344468889 = 5819^2 + 36667^2 .

It is not an unprimeable number, because it can be changed into a prime (1378329653) 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 11 ways as a sum of consecutive naturals, for example, 150419 + ... + 159318.

Almost surely, 2^1378329650 is an apocalyptic number.

1378329650 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1378329650 is a deficient number, since it is larger than the sum of its proper divisors (1214177410).

1378329650 is a wasteful number, since it uses less digits than its factorization.

1378329650 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 309838 (or 309833 counting only the distinct ones).

The product of its (nonzero) digits is 272160, while the sum is 44.

The square root of 1378329650 is about 37125.8622795485. The cubic root of 1378329650 is about 1112.8869066240.

The spelling of 1378329650 in words is "one billion, three hundred seventy-eight million, three hundred twenty-nine thousand, six hundred fifty".