1123420340 has 24 divisors (see below), whose sum is σ = 2696209152. Its totient is φ = 385172640.

The previous prime is 1123420321. The next prime is 1123420343. The reversal of 1123420340 is 430243211.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1123420343) 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 7 ways as a sum of consecutive naturals, for example, 4012076 + ... + 4012355.

It is an arithmetic number, because the mean of its divisors is an integer number (112342048).

Almost surely, 2^1123420340 is an apocalyptic number.

1123420340 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1123420340 is an abundant number, since it is smaller than the sum of its proper divisors (1572788812).

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

1123420340 is a wasteful number, since it uses less digits than its factorization.

1123420340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8024447 (or 8024445 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 20.

The square root of 1123420340 is about 33517.4632094972. The cubic root of 1123420340 is about 1039.5548945875.

Adding to 1123420340 its reverse (430243211), we get a palindrome (1553663551).

The spelling of 1123420340 in words is "one billion, one hundred twenty-three million, four hundred twenty thousand, three hundred forty".