1040390 has 32 divisors (see below), whose sum is σ = 2068416. Its totient is φ = 374400.

The previous prime is 1040387. The next prime is 1040407. The reversal of 1040390 is 930401.

It is a super-2 number, since 2×1040390² = 2164822704200, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6815 + ... + 6965.

It is an arithmetic number, because the mean of its divisors is an integer number (64638).

2^1040390 is an apocalyptic number.

1040390 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1040390 is a deficient number, since it is larger than the sum of its proper divisors (1028026).

1040390 is a wasteful number, since it uses less digits than its factorization.

1040390 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 224.

The product of its (nonzero) digits is 108, while the sum is 17.

The square root of 1040390 is about 1019.9950980274. The cubic root of 1040390 is about 101.3286032918.

Adding to 1040390 its reverse (930401), we get a palindrome (1970791).

The spelling of 1040390 in words is "one million, forty thousand, three hundred ninety".