1385611947 has 16 divisors (see below), whose sum is σ = 2053723680. Its totient is φ = 923306976.

The previous prime is 1385611937. The next prime is 1385611949. The reversal of 1385611947 is 7491165831.

1385611947 is a `hidden beast` number, since 1 + 38 + 561 + 19 + 47 = 666.

It is not a de Polignac number, because 1385611947 - 2⁷ = 1385611819 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1385611949) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 52753 + ... + 74525.

It is an arithmetic number, because the mean of its divisors is an integer number (128357730).

Almost surely, 2^1385611947 is an apocalyptic number.

1385611947 is a deficient number, since it is larger than the sum of its proper divisors (668111733).

1385611947 is a wasteful number, since it uses less digits than its factorization.

1385611947 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24139 (or 24133 counting only the distinct ones).

The product of its digits is 181440, while the sum is 45.

The square root of 1385611947 is about 37223.8088728169. The cubic root of 1385611947 is about 1114.8434153079.

The spelling of 1385611947 in words is "one billion, three hundred eighty-five million, six hundred eleven thousand, nine hundred forty-seven".