1388938925 has 12 divisors (see below), whose sum is σ = 1878855936. Its totient is φ = 1010137200.

The previous prime is 1388938909. The next prime is 1388938933. The reversal of 1388938925 is 5298398831.

It is not a de Polignac number, because 1388938925 - 2⁴ = 1388938909 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2525069 + ... + 2525618.

It is an arithmetic number, because the mean of its divisors is an integer number (156571328).

Almost surely, 2^1388938925 is an apocalyptic number.

It is an amenable number.

1388938925 is a deficient number, since it is larger than the sum of its proper divisors (489917011).

1388938925 is a wasteful number, since it uses less digits than its factorization.

1388938925 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5050708 (or 5050703 counting only the distinct ones).

The product of its digits is 3732480, while the sum is 56.

The square root of 1388938925 is about 37268.4709238251. The cubic root of 1388938925 is about 1115.7349816380.

The spelling of 1388938925 in words is "one billion, three hundred eighty-eight million, nine hundred thirty-eight thousand, nine hundred twenty-five".