1385649819 has 12 divisors (see below), whose sum is σ = 2001820392. Its totient is φ = 923616000.

The previous prime is 1385649799. The next prime is 1385649851. The reversal of 1385649819 is 9189465831.

1385649819 is a `hidden beast` number, since 138 + 5 + 6 + 498 + 19 = 666.

It is not a de Polignac number, because 1385649819 - 2⁷ = 1385649691 is a prime.

It is a super-2 number, since 2×1385649819² = 3840050841789465522, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1385649619) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 89019 + ... + 103419.

It is an arithmetic number, because the mean of its divisors is an integer number (166818366).

Almost surely, 2^1385649819 is an apocalyptic number.

1385649819 is a deficient number, since it is larger than the sum of its proper divisors (616170573).

1385649819 is a wasteful number, since it uses less digits than its factorization.

1385649819 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25098 (or 25095 counting only the distinct ones).

The product of its digits is 1866240, while the sum is 54.

The square root of 1385649819 is about 37224.3175760147. The cubic root of 1385649819 is about 1114.8535723040.

The spelling of 1385649819 in words is "one billion, three hundred eighty-five million, six hundred forty-nine thousand, eight hundred nineteen".