1040012220 has 96 divisors (see below), whose sum is σ = 3141472320. Its totient is φ = 255559680.

The previous prime is 1040012219. The next prime is 1040012221. The reversal of 1040012220 is 222100401.

It is an interprime number because it is at equal distance from previous prime (1040012219) and next prime (1040012221).

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a junction number, because it is equal to n+sod(n) for n = 1040012196 and 1040012205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1040012221) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 880030 + ... + 881210.

It is an arithmetic number, because the mean of its divisors is an integer number (32723670).

Almost surely, 2^1040012220 is an apocalyptic number.

1040012220 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 1040012220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1570736160).

1040012220 is an abundant number, since it is smaller than the sum of its proper divisors (2101460100).

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

1040012220 is a wasteful number, since it uses less digits than its factorization.

1040012220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2335 (or 2333 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 12.

The square root of 1040012220 is about 32249.2204556947. The cubic root of 1040012220 is about 1013.1633720123.

Adding to 1040012220 its reverse (222100401), we get a palindrome (1262112621).

The spelling of 1040012220 in words is "one billion, forty million, twelve thousand, two hundred twenty".