1388866149 has 16 divisors (see below), whose sum is σ = 2244632640. Its totient is φ = 841736880.

The previous prime is 1388866147. The next prime is 1388866169. The reversal of 1388866149 is 9416688831.

1388866149 is a `hidden beast` number, since 13 + 8 + 8 + 8 + 6 + 614 + 9 = 666.

It is not a de Polignac number, because 1388866149 - 2¹ = 1388866147 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1388866095 and 1388866104.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1388866147) 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, 2337862 + ... + 2338455.

It is an arithmetic number, because the mean of its divisors is an integer number (140289540).

Almost surely, 2^1388866149 is an apocalyptic number.

It is an amenable number.

1388866149 is a deficient number, since it is larger than the sum of its proper divisors (855766491).

1388866149 is a wasteful number, since it uses less digits than its factorization.

1388866149 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4676337 (or 4676331 counting only the distinct ones).

The product of its digits is 1990656, while the sum is 54.

The square root of 1388866149 is about 37267.4945361236. The cubic root of 1388866149 is about 1115.7154943047.

The spelling of 1388866149 in words is "one billion, three hundred eighty-eight million, eight hundred sixty-six thousand, one hundred forty-nine".