1378933956 has 45 divisors (see below), whose sum is σ = 3606553951. Its totient is φ = 459421848.

The previous prime is 1378933951. The next prime is 1378933957. The reversal of 1378933956 is 6593398731.

The square root of 1378933956 is 37134.

It is a perfect power (a square), and thus also a powerful number.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1378933951) 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 14 ways as a sum of consecutive naturals, for example, 667381 + ... + 669443.

Almost surely, 2^1378933956 is an apocalyptic number.

1378933956 is the 37134-th square number.

It is an amenable number.

1378933956 is an abundant number, since it is smaller than the sum of its proper divisors (2227619995).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1378933956 is an frugal number, since it uses more digits than its factorization.

1378933956 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4142 (or 2068 counting only the distinct ones).

The product of its digits is 3674160, while the sum is 54.

The cubic root of 1378933956 is about 1113.0495251900.

The spelling of 1378933956 in words is "one billion, three hundred seventy-eight million, nine hundred thirty-three thousand, nine hundred fifty-six".