1120423720 has 96 divisors (see below), whose sum is σ = 2755128600. Its totient is φ = 407642112.

The previous prime is 1120423697. The next prime is 1120423813. The reversal of 1120423720 is 273240211.

It can be written as a sum of positive squares in 12 ways, for example, as 121484484 + 998939236 = 11022^2 + 31606^2 .

It is a junction number, because it is equal to n+sod(n) for n = 1120423691 and 1120423700.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4892566 + ... + 4892794.

Almost surely, 2^1120423720 is an apocalyptic number.

1120423720 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 1120423720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1377564300).

1120423720 is an abundant number, since it is smaller than the sum of its proper divisors (1634704880).

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

1120423720 is a wasteful number, since it uses less digits than its factorization.

1120423720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 447 (or 346 counting only the distinct ones).

The product of its (nonzero) digits is 672, while the sum is 22.

The square root of 1120423720 is about 33472.7309910620. The cubic root of 1120423720 is about 1038.6297659775.

Adding to 1120423720 its reverse (273240211), we get a palindrome (1393663931).

The spelling of 1120423720 in words is "one billion, one hundred twenty million, four hundred twenty-three thousand, seven hundred twenty".