1389843625 has 32 divisors (see below), whose sum is σ = 1790530560. Its totient is φ = 1076400000.

The previous prime is 1389843571. The next prime is 1389843649. The reversal of 1389843625 is 5263489831.

It is not a de Polignac number, because 1389843625 - 2²⁹ = 852972713 is a prime.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 711400 + ... + 713350.

It is an arithmetic number, because the mean of its divisors is an integer number (55954080).

Almost surely, 2^1389843625 is an apocalyptic number.

It is an amenable number.

1389843625 is a deficient number, since it is larger than the sum of its proper divisors (400686935).

1389843625 is a wasteful number, since it uses less digits than its factorization.

1389843625 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2146 (or 2136 counting only the distinct ones).

The product of its digits is 1244160, while the sum is 49.

The square root of 1389843625 is about 37280.6065535420. The cubic root of 1389843625 is about 1115.9771776378.

The spelling of 1389843625 in words is "one billion, three hundred eighty-nine million, eight hundred forty-three thousand, six hundred twenty-five".