1388460609 has 20 divisors (see below), whose sum is σ = 2097435780. Its totient is φ = 915235200.

The previous prime is 1388460607. The next prime is 1388460617. The reversal of 1388460609 is 9060648831.

1388460609 is a `hidden beast` number, since 1 + 38 + 8 + 4 + 6 + 0 + 609 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 213890625 + 1174569984 = 14625^2 + 34272^2 .

It is not a de Polignac number, because 1388460609 - 2¹ = 1388460607 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1388460607) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 89092 + ... + 103509.

It is an arithmetic number, because the mean of its divisors is an integer number (104871789).

Almost surely, 2^1388460609 is an apocalyptic number.

It is an amenable number.

1388460609 is a deficient number, since it is larger than the sum of its proper divisors (708975171).

1388460609 is an equidigital number, since it uses as much as digits as its factorization.

1388460609 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 192702 (or 192693 counting only the distinct ones).

The product of its (nonzero) digits is 248832, while the sum is 45.

The square root of 1388460609 is about 37262.0532042989. The cubic root of 1388460609 is about 1115.6068898126.

The spelling of 1388460609 in words is "one billion, three hundred eighty-eight million, four hundred sixty thousand, six hundred nine".