1385903780 has 12 divisors (see below), whose sum is σ = 2910397980. Its totient is φ = 554361504.

The previous prime is 1385903737. The next prime is 1385903789. The reversal of 1385903780 is 873095831.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 928542784 + 457360996 = 30472^2 + 21386^2 .

It is not an unprimeable number, because it can be changed into a prime (1385903789) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 34647575 + ... + 34647614.

It is an arithmetic number, because the mean of its divisors is an integer number (242533165).

Almost surely, 2^1385903780 is an apocalyptic number.

1385903780 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1385903780 is an abundant number, since it is smaller than the sum of its proper divisors (1524494200).

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

1385903780 is a wasteful number, since it uses less digits than its factorization.

1385903780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69295198 (or 69295196 counting only the distinct ones).

The product of its (nonzero) digits is 181440, while the sum is 44.

The square root of 1385903780 is about 37227.7286441169. The cubic root of 1385903780 is about 1114.9216780232.

The spelling of 1385903780 in words is "one billion, three hundred eighty-five million, nine hundred three thousand, seven hundred eighty".