1389397910 has 8 divisors (see below), whose sum is σ = 2500916256. Its totient is φ = 555759160.

The previous prime is 1389397883. The next prime is 1389397931. The reversal of 1389397910 is 197939831.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 69469886 + ... + 69469905.

It is an arithmetic number, because the mean of its divisors is an integer number (312614532).

Almost surely, 2^1389397910 is an apocalyptic number.

1389397910 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1389397910 is a deficient number, since it is larger than the sum of its proper divisors (1111518346).

1389397910 is a wasteful number, since it uses less digits than its factorization.

1389397910 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 138939798.

The product of its (nonzero) digits is 367416, while the sum is 50.

The square root of 1389397910 is about 37274.6282342292. The cubic root of 1389397910 is about 1115.8578690239.

The spelling of 1389397910 in words is "one billion, three hundred eighty-nine million, three hundred ninety-seven thousand, nine hundred ten".