1230440 has 32 divisors (see below), whose sum is σ = 2916000. Its totient is φ = 465984.

The previous prime is 1230433. The next prime is 1230461. The reversal of 1230440 is 440321.

1230440 = 118² + 119² + ... + 174².

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 50 + ... + 1569.

It is an arithmetic number, because the mean of its divisors is an integer number (91125).

2^1230440 is an apocalyptic number.

1230440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1230440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1458000).

1230440 is an abundant number, since it is smaller than the sum of its proper divisors (1685560).

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

1230440 is a wasteful number, since it uses less digits than its factorization.

1230440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1649 (or 1645 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 14.

The square root of 1230440 is about 1109.2520002236. The cubic root of 1230440 is about 107.1569014394.

Adding to 1230440 its reverse (440321), we get a palindrome (1670761).

The spelling of 1230440 in words is "one million, two hundred thirty thousand, four hundred forty".