1388484149 has 4 divisors (see below), whose sum is σ = 1495290636. Its totient is φ = 1281677664.

The previous prime is 1388484131. The next prime is 1388484151. The reversal of 1388484149 is 9414848831.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 575664049 + 812820100 = 23993^2 + 28510^2 .

It is a cyclic number.

It is not a de Polignac number, because 1388484149 - 2²⁴ = 1371706933 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1388484097 and 1388484106.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1388484169) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 53403224 + ... + 53403249.

It is an arithmetic number, because the mean of its divisors is an integer number (373822659).

Almost surely, 2^1388484149 is an apocalyptic number.

It is an amenable number.

1388484149 is a deficient number, since it is larger than the sum of its proper divisors (106806487).

1388484149 is a wasteful number, since it uses less digits than its factorization.

1388484149 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 106806486.

The product of its digits is 884736, while the sum is 50.

The square root of 1388484149 is about 37262.3690739062. The cubic root of 1388484149 is about 1115.6131944538.

The spelling of 1388484149 in words is "one billion, three hundred eighty-eight million, four hundred eighty-four thousand, one hundred forty-nine".