1378620933 has 16 divisors (see below), whose sum is σ = 2009074176. Its totient is φ = 837112320.

The previous prime is 1378620931. The next prime is 1378620973. The reversal of 1378620933 is 3390268731.

It is a happy number.

It is not a de Polignac number, because 1378620933 - 2¹ = 1378620931 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1378620931) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 434416 + ... + 437577.

It is an arithmetic number, because the mean of its divisors is an integer number (125567136).

Almost surely, 2^1378620933 is an apocalyptic number.

It is an amenable number.

1378620933 is a deficient number, since it is larger than the sum of its proper divisors (630453243).

1378620933 is a wasteful number, since it uses less digits than its factorization.

1378620933 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 872044.

The product of its (nonzero) digits is 163296, while the sum is 42.

The square root of 1378620933 is about 37129.7849845646. The cubic root of 1378620933 is about 1112.9652967257.

The spelling of 1378620933 in words is "one billion, three hundred seventy-eight million, six hundred twenty thousand, nine hundred thirty-three".