1389270 has 16 divisors (see below), whose sum is σ = 3334320. Its totient is φ = 370464.

The previous prime is 1389259. The next prime is 1389277. The reversal of 1389270 is 729831.

It is a happy number.

It is a super-2 number, since 2×1389270² = 3860142265800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (30), and also a Moran number because the ratio is a prime number: 46309 = 1389270 / (1 + 3 + 8 + 9 + 2 + 7 + 0).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1389277) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23125 + ... + 23184.

It is an arithmetic number, because the mean of its divisors is an integer number (208395).

2^1389270 is an apocalyptic number.

1389270 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1389270 is an abundant number, since it is smaller than the sum of its proper divisors (1945050).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1389270 is a wasteful number, since it uses less digits than its factorization.

1389270 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46319.

The product of its (nonzero) digits is 3024, while the sum is 30.

The square root of 1389270 is about 1178.6729826377. The cubic root of 1389270 is about 111.5823625472.

The spelling of 1389270 in words is "one million, three hundred eighty-nine thousand, two hundred seventy".