1385938081 has 8 divisors (see below), whose sum is σ = 1534499424. Its totient is φ = 1241137920.

The previous prime is 1385938079. The next prime is 1385938091. The reversal of 1385938081 is 1808395831.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1385938081 - 2¹ = 1385938079 is a prime.

It is a super-2 number, since 2×1385938081² = 3841648728731925122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1385938051) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 939520 + ... + 940993.

It is an arithmetic number, because the mean of its divisors is an integer number (191812428).

Almost surely, 2^1385938081 is an apocalyptic number.

1385938081 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1385938081 is a deficient number, since it is larger than the sum of its proper divisors (148561343).

1385938081 is a wasteful number, since it uses less digits than its factorization.

1385938081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1880591.

The product of its (nonzero) digits is 207360, while the sum is 46.

The square root of 1385938081 is about 37228.1893328161. The cubic root of 1385938081 is about 1114.9308760194.

The spelling of 1385938081 in words is "one billion, three hundred eighty-five million, nine hundred thirty-eight thousand, eighty-one".