1389257895 has 8 divisors (see below), whose sum is σ = 2222812656. Its totient is φ = 740937536.

The previous prime is 1389257893. The next prime is 1389257911. The reversal of 1389257895 is 5987529831.

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 1389257895 - 2¹ = 1389257893 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1389257893) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 46308582 + ... + 46308611.

It is an arithmetic number, because the mean of its divisors is an integer number (277851582).

Almost surely, 2^1389257895 is an apocalyptic number.

1389257895 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1389257895 is a deficient number, since it is larger than the sum of its proper divisors (833554761).

1389257895 is an equidigital number, since it uses as much as digits as its factorization.

1389257895 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 92617201.

The product of its digits is 5443200, while the sum is 57.

The square root of 1389257895 is about 37272.7500326982. The cubic root of 1389257895 is about 1115.8203846606.

The spelling of 1389257895 in words is "one billion, three hundred eighty-nine million, two hundred fifty-seven thousand, eight hundred ninety-five".