1389670 has 8 divisors (see below), whose sum is σ = 2501424. Its totient is φ = 555864.

The previous prime is 1389667. The next prime is 1389673. The reversal of 1389670 is 769831.

It is an interprime number because it is at equal distance from previous prime (1389667) and next prime (1389673).

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1389673) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 69474 + ... + 69493.

It is an arithmetic number, because the mean of its divisors is an integer number (312678).

2^1389670 is an apocalyptic number.

1389670 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1389670 is a deficient number, since it is larger than the sum of its proper divisors (1111754).

1389670 is a wasteful number, since it uses less digits than its factorization.

1389670 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 138974.

The product of its (nonzero) digits is 9072, while the sum is 34.

The square root of 1389670 is about 1178.8426527743. The cubic root of 1389670 is about 111.5930704878.

The spelling of 1389670 in words is "one million, three hundred eighty-nine thousand, six hundred seventy".