1388875265 has 8 divisors (see below), whose sum is σ = 1764688680. Its totient is φ = 1045741312.

The previous prime is 1388875261. The next prime is 1388875277. The reversal of 1388875265 is 5625788831.

It can be written as a sum of positive squares in 4 ways, for example, as 338596801 + 1050278464 = 18401^2 + 32408^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1388875265 - 2² = 1388875261 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1388875261) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8169770 + ... + 8169939.

It is an arithmetic number, because the mean of its divisors is an integer number (220586085).

Almost surely, 2^1388875265 is an apocalyptic number.

It is an amenable number.

1388875265 is a deficient number, since it is larger than the sum of its proper divisors (375813415).

1388875265 is a wasteful number, since it uses less digits than its factorization.

1388875265 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16339731.

The product of its digits is 3225600, while the sum is 53.

The square root of 1388875265 is about 37267.6168408982. The cubic root of 1388875265 is about 1115.7179353463.

The spelling of 1388875265 in words is "one billion, three hundred eighty-eight million, eight hundred seventy-five thousand, two hundred sixty-five".