1000390 has 16 divisors (see below), whose sum is σ = 1827360. Its totient is φ = 394240.

The previous prime is 1000381. The next prime is 1000393. The reversal of 1000390 is 930001.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 1000390.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1000393) 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, 6 + ... + 1414.

It is an arithmetic number, because the mean of its divisors is an integer number (114210).

2^1000390 is an apocalyptic number.

1000390 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1000390 is a deficient number, since it is larger than the sum of its proper divisors (826970).

1000390 is a wasteful number, since it uses less digits than its factorization.

1000390 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1487.

The product of its (nonzero) digits is 27, while the sum is 13.

The square root of 1000390 is about 1000.1949809912. The cubic root of 1000390 is about 100.0129983104.

Adding to 1000390 its reverse (930001), we get a palindrome (1930391).

The spelling of 1000390 in words is "one million, three hundred ninety", and thus it is an aban number.