1378023705 has 32 divisors (see below), whose sum is σ = 2452619520. Its totient is φ = 734106240.

The previous prime is 1378023683. The next prime is 1378023707. The reversal of 1378023705 is 5073208731.

It is not a de Polignac number, because 1378023705 - 2⁶ = 1378023641 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1378023705.

It is not an unprimeable number, because it can be changed into a prime (1378023707) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 123300 + ... + 134010.

It is an arithmetic number, because the mean of its divisors is an integer number (76644360).

Almost surely, 2^1378023705 is an apocalyptic number.

1378023705 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1378023705 is a deficient number, since it is larger than the sum of its proper divisors (1074595815).

1378023705 is a wasteful number, since it uses less digits than its factorization.

1378023705 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11678 (or 11672 counting only the distinct ones).

The product of its (nonzero) digits is 35280, while the sum is 36.

The square root of 1378023705 is about 37121.7416751962. The cubic root of 1378023705 is about 1112.8045587910.

The spelling of 1378023705 in words is "one billion, three hundred seventy-eight million, twenty-three thousand, seven hundred five".