1385670 has 128 divisors (see below), whose sum is σ = 4354560. Its totient is φ = 276480.

The previous prime is 1385647. The next prime is 1385693. The reversal of 1385670 is 765831.

1385670 = 261² + 262² + ... + 279².

It is an interprime number because it is at equal distance from previous prime (1385647) and next prime (1385693).

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 72921 + ... + 72939.

It is an arithmetic number, because the mean of its divisors is an integer number (34020).

2^1385670 is an apocalyptic number.

1385670 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 1385670, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2177280).

1385670 is an abundant number, since it is smaller than the sum of its proper divisors (2968890).

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

1385670 is a wasteful number, since it uses less digits than its factorization.

1385670 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70.

The product of its (nonzero) digits is 5040, while the sum is 30.

The square root of 1385670 is about 1177.1448508998. The cubic root of 1385670 is about 111.4858984626.

The spelling of 1385670 in words is "one million, three hundred eighty-five thousand, six hundred seventy".