1138886385 has 64 divisors (see below), whose sum is σ = 2252759040. Its totient is φ = 478437120.

The previous prime is 1138886351. The next prime is 1138886407. The reversal of 1138886385 is 5836888311.

It is not a de Polignac number, because 1138886385 - 2⁹ = 1138885873 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 324490 + ... + 327980.

It is an arithmetic number, because the mean of its divisors is an integer number (35199360).

Almost surely, 2^1138886385 is an apocalyptic number.

1138886385 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1138886385 is a deficient number, since it is larger than the sum of its proper divisors (1113872655).

1138886385 is a wasteful number, since it uses less digits than its factorization.

1138886385 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3758.

The product of its digits is 1105920, while the sum is 51.

The square root of 1138886385 is about 33747.3907880298. The cubic root of 1138886385 is about 1044.3036606953.

The spelling of 1138886385 in words is "one billion, one hundred thirty-eight million, eight hundred eighty-six thousand, three hundred eighty-five".