403040 has 48 divisors (see below), whose sum is σ = 1043280. Its totient is φ = 145920.

The previous prime is 403037. The next prime is 403043. The reversal of 403040 is 40304.

It is an interprime number because it is at equal distance from previous prime (403037) and next prime (403043).

It is a Harshad number since it is a multiple of its sum of digits (11).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (403043) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1646 + ... + 1874.

It is an arithmetic number, because the mean of its divisors is an integer number (21735).

2⁴⁰³⁰⁴⁰ is an apocalyptic number.

403040 is a gapful number since it is divisible by the number (40) 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 403040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (521640).

403040 is an abundant number, since it is smaller than the sum of its proper divisors (640240).

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

403040 is a wasteful number, since it uses less digits than its factorization.

403040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 255 (or 247 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 11.

The square root of 403040 is about 634.8543139965. The cubic root of 403040 is about 73.8668166893.

Adding to 403040 its reverse (40304), we get a palindrome (443344).

The spelling of 403040 in words is "four hundred three thousand, forty", and thus it is an iban number.