1123445780 has 24 divisors (see below), whose sum is σ = 2392467840. Its totient is φ = 443048480.

The previous prime is 1123445767. The next prime is 1123445783. The reversal of 1123445780 is 875443211.

It is a self number, because there is not a number n which added to its sum of digits gives 1123445780.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1123445783) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 394160 + ... + 396999.

It is an arithmetic number, because the mean of its divisors is an integer number (99686160).

Almost surely, 2^1123445780 is an apocalyptic number.

1123445780 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1123445780 is an abundant number, since it is smaller than the sum of its proper divisors (1269022060).

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

1123445780 is a wasteful number, since it uses less digits than its factorization.

1123445780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 791239 (or 791237 counting only the distinct ones).

The product of its (nonzero) digits is 26880, while the sum is 35.

The square root of 1123445780 is about 33517.8427110099. The cubic root of 1123445780 is about 1039.5627414803.

Adding to 1123445780 its reverse (875443211), we get a palindrome (1998888991).

The spelling of 1123445780 in words is "one billion, one hundred twenty-three million, four hundred forty-five thousand, seven hundred eighty".