1385133738 has 32 divisors (see below), whose sum is σ = 2908071936. Its totient is φ = 438985008.

The previous prime is 1385133733. The next prime is 1385133779. The reversal of 1385133738 is 8373315831.

It is a self number, because there is not a number n which added to its sum of digits gives 1385133738.

It is not an unprimeable number, because it can be changed into a prime (1385133733) 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 15 ways as a sum of consecutive naturals, for example, 7006 + ... + 53097.

It is an arithmetic number, because the mean of its divisors is an integer number (90877248).

Almost surely, 2^1385133738 is an apocalyptic number.

1385133738 is an abundant number, since it is smaller than the sum of its proper divisors (1522938198).

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

1385133738 is a wasteful number, since it uses less digits than its factorization.

1385133738 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60298.

The product of its digits is 181440, while the sum is 42.

The square root of 1385133738 is about 37217.3848893229. The cubic root of 1385133738 is about 1114.7151471927.

The spelling of 1385133738 in words is "one billion, three hundred eighty-five million, one hundred thirty-three thousand, seven hundred thirty-eight".