1388458425 has 24 divisors (see below), whose sum is σ = 2430621216. Its totient is φ = 696951040.

The previous prime is 1388458403. The next prime is 1388458427. The reversal of 1388458425 is 5248548831.

It is not a de Polignac number, because 1388458425 - 2⁹ = 1388457913 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1388458427) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 543219 + ... + 545768.

It is an arithmetic number, because the mean of its divisors is an integer number (101275884).

Almost surely, 2^1388458425 is an apocalyptic number.

1388458425 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1388458425 is a deficient number, since it is larger than the sum of its proper divisors (1042162791).

1388458425 is a wasteful number, since it uses less digits than its factorization.

1388458425 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1089017 (or 1089012 counting only the distinct ones).

The product of its digits is 1228800, while the sum is 48.

The square root of 1388458425 is about 37262.0238983338. The cubic root of 1388458425 is about 1115.6063048755.

The spelling of 1388458425 in words is "one billion, three hundred eighty-eight million, four hundred fifty-eight thousand, four hundred twenty-five".