1388038149 has 24 divisors (see below), whose sum is σ = 2062569600. Its totient is φ = 898954560.

The previous prime is 1388038123. The next prime is 1388038159. The reversal of 1388038149 is 9418308831.

It is not a de Polignac number, because 1388038149 - 2¹⁶ = 1387972613 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1388038159) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 80322 + ... + 96060.

It is an arithmetic number, because the mean of its divisors is an integer number (85940400).

Almost surely, 2^1388038149 is an apocalyptic number.

It is an amenable number.

1388038149 is a deficient number, since it is larger than the sum of its proper divisors (674531451).

1388038149 is a wasteful number, since it uses less digits than its factorization.

1388038149 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16025 (or 16022 counting only the distinct ones).

The product of its (nonzero) digits is 165888, while the sum is 45.

The square root of 1388038149 is about 37256.3840032819. The cubic root of 1388038149 is about 1115.4937316163.

The spelling of 1388038149 in words is "one billion, three hundred eighty-eight million, thirty-eight thousand, one hundred forty-nine".