1385690 has 8 divisors (see below), whose sum is σ = 2494260. Its totient is φ = 554272.

The previous prime is 1385647. The next prime is 1385693. The reversal of 1385690 is 965831.

It can be written as a sum of positive squares in 2 ways, for example, as 1385329 + 361 = 1177^2 + 19^2 .

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

It is a super-2 number, since 2×1385690² = 3840273552200, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1385693) 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, 69275 + ... + 69294.

2^1385690 is an apocalyptic number.

1385690 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1385690 is a deficient number, since it is larger than the sum of its proper divisors (1108570).

1385690 is a wasteful number, since it uses less digits than its factorization.

1385690 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 138576.

The product of its (nonzero) digits is 6480, while the sum is 32.

The square root of 1385690 is about 1177.1533460004. The cubic root of 1385690 is about 111.4864348355.

The spelling of 1385690 in words is "one million, three hundred eighty-five thousand, six hundred ninety".