1040403120 has 80 divisors (see below), whose sum is σ = 3231064032. Its totient is φ = 276940800.

The previous prime is 1040403113. The next prime is 1040403127. The reversal of 1040403120 is 213040401.

It is an interprime number because it is at equal distance from previous prime (1040403113) and next prime (1040403127).

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 1040403120.

It is not an unprimeable number, because it can be changed into a prime (1040403127) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 140634 + ... + 147846.

Almost surely, 2^1040403120 is an apocalyptic number.

1040403120 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 1040403120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1615532016).

1040403120 is an abundant number, since it is smaller than the sum of its proper divisors (2190660912).

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

1040403120 is a wasteful number, since it uses less digits than its factorization.

1040403120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7830 (or 7824 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 15.

The square root of 1040403120 is about 32255.2804979278. The cubic root of 1040403120 is about 1013.2902923008.

Adding to 1040403120 its reverse (213040401), we get a palindrome (1253443521).

The spelling of 1040403120 in words is "one billion, forty million, four hundred three thousand, one hundred twenty".