1388383025 has 6 divisors (see below), whose sum is σ = 1721594982. Its totient is φ = 1110706400.

The previous prime is 1388382973. The next prime is 1388383027. The reversal of 1388383025 is 5203838831.

It can be written as a sum of positive squares in 3 ways, for example, as 27363361 + 1361019664 = 5231^2 + 36892^2 .

It is not a de Polignac number, because 1388383025 - 2⁸ = 1388382769 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1388383027) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 27767636 + ... + 27767685.

It is an arithmetic number, because the mean of its divisors is an integer number (286932497).

Almost surely, 2^1388383025 is an apocalyptic number.

It is an amenable number.

1388383025 is a deficient number, since it is larger than the sum of its proper divisors (333211957).

1388383025 is an equidigital number, since it uses as much as digits as its factorization.

1388383025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55535331 (or 55535326 counting only the distinct ones).

The product of its (nonzero) digits is 138240, while the sum is 41.

The square root of 1388383025 is about 37261.0121306440. The cubic root of 1388383025 is about 1115.5861102393.

The spelling of 1388383025 in words is "one billion, three hundred eighty-eight million, three hundred eighty-three thousand, twenty-five".